{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-26780", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.177Z", "datePublished": "2024-04-04T08:20:15.120Z", "dateUpdated": "2024-12-19T08:47:17.999Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T08:47:17.999Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Fix task hung while purging oob_skb in GC.\n\nsyzbot reported a task hung; at the same time, GC was looping infinitely\nin list_for_each_entry_safe() for OOB skb. [0]\n\nsyzbot demonstrated that the list_for_each_entry_safe() was not actually\nsafe in this case.\n\nA single skb could have references for multiple sockets. If we free such\na skb in the list_for_each_entry_safe(), the current and next sockets could\nbe unlinked in a single iteration.\n\nunix_notinflight() uses list_del_init() to unlink the socket, so the\nprefetched next socket forms a loop itself and list_for_each_entry_safe()\nnever stops.\n\nHere, we must use while() and make sure we always fetch the first socket.\n\n[0]:\nSending NMI from CPU 0 to CPUs 1:\nNMI backtrace for cpu 1\nCPU: 1 PID: 5065 Comm: syz-executor236 Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\nRIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]\nRIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]\nRIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:207\nCode: cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 14 25 40 c2 03 00 <65> 8b 05 b4 7c 78 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74\nRSP: 0018:ffffc900033efa58 EFLAGS: 00000283\nRAX: ffff88807b077800 RBX: ffff88807b077800 RCX: 1ffffffff27b1189\nRDX: ffff88802a5a3b80 RSI: ffffffff8968488d RDI: ffff88807b077f70\nRBP: ffffc900033efbb0 R08: 0000000000000001 R09: fffffbfff27a900c\nR10: ffffffff93d48067 R11: ffffffff8ae000eb R12: ffff88807b077800\nR13: dffffc0000000000 R14: ffff88807b077e40 R15: 0000000000000001\nFS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000564f4fc1e3a8 CR3: 000000000d57a000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <NMI>\n </NMI>\n <TASK>\n unix_gc+0x563/0x13b0 net/unix/garbage.c:319\n unix_release_sock+0xa93/0xf80 net/unix/af_unix.c:683\n unix_release+0x91/0xf0 net/unix/af_unix.c:1064\n __sock_release+0xb0/0x270 net/socket.c:659\n sock_close+0x1c/0x30 net/socket.c:1421\n __fput+0x270/0xb80 fs/file_table.c:376\n task_work_run+0x14f/0x250 kernel/task_work.c:180\n exit_task_work include/linux/task_work.h:38 [inline]\n do_exit+0xa8a/0x2ad0 kernel/exit.c:871\n do_group_exit+0xd4/0x2a0 kernel/exit.c:1020\n __do_sys_exit_group kernel/exit.c:1031 [inline]\n __se_sys_exit_group kernel/exit.c:1029 [inline]\n __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x6f/0x77\nRIP: 0033:0x7f9d6cbdac09\nCode: Unable to access opcode bytes at 0x7f9d6cbdabdf.\nRSP: 002b:00007fff5952feb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9d6cbdac09\nRDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000\nRBP: 00007f9d6cc552b0 R08: ffffffffffffffb8 R09: 0000000000000006\nR10: 0000000000000006 R11: 0000000000000246 R12: 00007f9d6cc552b0\nR13: 0000000000000000 R14: 00007f9d6cc55d00 R15: 00007f9d6cbabe70\n </TASK>"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/unix/garbage.c"], "versions": [{"version": "4fe505c63aa3273135a57597fda761e9aecc7668", "lessThan": "36f7371de977f805750748e80279be7e370df85c", "status": "affected", "versionType": "git"}, {"version": "e0e09186d8821ad59806115d347ea32efa43ca4b", "lessThan": "2a3d40b4025fcfe51b04924979f1653993b17669", "status": "affected", "versionType": "git"}, {"version": "b74aa9ce13d02b7fd37c5325b99854f91b9b4276", "lessThan": "69e0f04460f4037e01e29f0d9675544f62aafca3", "status": "affected", "versionType": "git"}, {"version": "82ae47c5c3a6b27fdc0f9e83c1499cb439c56140", "lessThan": "cb8890318dde26fc89c6ea67d6e9070ab50b6e91", "status": "affected", "versionType": "git"}, {"version": "1279f9d9dec2d7462823a18c29ad61359e0a007d", "lessThan": "25236c91b5ab4a26a56ba2e79b8060cf4e047839", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/unix/garbage.c"], "versions": [{"version": "6.1.78", "lessThan": "6.1.81", "status": "affected", "versionType": "semver"}, {"version": "6.6.17", "lessThan": "6.6.21", "status": "affected", "versionType": "semver"}, {"version": "6.7.5", "lessThan": "6.7.9", "status": "affected", "versionType": "semver"}]}], "references": [{"url": "https://git.kernel.org/stable/c/36f7371de977f805750748e80279be7e370df85c"}, {"url": "https://git.kernel.org/stable/c/2a3d40b4025fcfe51b04924979f1653993b17669"}, {"url": "https://git.kernel.org/stable/c/69e0f04460f4037e01e29f0d9675544f62aafca3"}, {"url": "https://git.kernel.org/stable/c/cb8890318dde26fc89c6ea67d6e9070ab50b6e91"}, {"url": "https://git.kernel.org/stable/c/25236c91b5ab4a26a56ba2e79b8060cf4e047839"}], "title": "af_unix: Fix task hung while purging oob_skb in GC.", "x_generator": {"engine": "bippy-5f407fcff5a0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:13.403Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/36f7371de977f805750748e80279be7e370df85c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/2a3d40b4025fcfe51b04924979f1653993b17669", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/69e0f04460f4037e01e29f0d9675544f62aafca3", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/cb8890318dde26fc89c6ea67d6e9070ab50b6e91", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/25236c91b5ab4a26a56ba2e79b8060cf4e047839", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-26780", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:51:08.468266Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:52.933Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/36f7371de977f805750748e80279be7e370df85c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/2a3d40b4025fcfe51b04924979f1653993b17669", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/69e0f04460f4037e01e29f0d9675544f62aafca3", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/cb8890318dde26fc89c6ea67d6e9070ab50b6e91", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/25236c91b5ab4a26a56ba2e79b8060cf4e047839", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:13.403Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-26780", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:51:08.468266Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:19.402Z"}}], "cna": {"title": "af_unix: Fix task hung while purging oob_skb in GC.", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4fe505c63aa3273135a57597fda761e9aecc7668", "lessThan": "36f7371de977f805750748e80279be7e370df85c", "versionType": "git"}, {"status": "affected", "version": "e0e09186d8821ad59806115d347ea32efa43ca4b", "lessThan": "2a3d40b4025fcfe51b04924979f1653993b17669", "versionType": "git"}, {"status": "affected", "version": "b74aa9ce13d02b7fd37c5325b99854f91b9b4276", "lessThan": "69e0f04460f4037e01e29f0d9675544f62aafca3", "versionType": "git"}, {"status": "affected", "version": "82ae47c5c3a6b27fdc0f9e83c1499cb439c56140", "lessThan": "cb8890318dde26fc89c6ea67d6e9070ab50b6e91", "versionType": "git"}, {"status": "affected", "version": "1279f9d9dec2d7462823a18c29ad61359e0a007d", "lessThan": "25236c91b5ab4a26a56ba2e79b8060cf4e047839", "versionType": "git"}], "programFiles": ["net/unix/garbage.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.1.78", "lessThan": "6.1.81", "versionType": "semver"}, {"status": "affected", "version": "6.6.17", "lessThan": "6.6.21", "versionType": "semver"}, {"status": "affected", "version": "6.7.5", "lessThan": "6.7.9", "versionType": "semver"}], "programFiles": ["net/unix/garbage.c"], "defaultStatus": "unaffected"}], "references": [{"url": "https://git.kernel.org/stable/c/36f7371de977f805750748e80279be7e370df85c"}, {"url": "https://git.kernel.org/stable/c/2a3d40b4025fcfe51b04924979f1653993b17669"}, {"url": "https://git.kernel.org/stable/c/69e0f04460f4037e01e29f0d9675544f62aafca3"}, {"url": "https://git.kernel.org/stable/c/cb8890318dde26fc89c6ea67d6e9070ab50b6e91"}, {"url": "https://git.kernel.org/stable/c/25236c91b5ab4a26a56ba2e79b8060cf4e047839"}], "x_generator": {"engine": "bippy-5f407fcff5a0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Fix task hung while purging oob_skb in GC.\n\nsyzbot reported a task hung; at the same time, GC was looping infinitely\nin list_for_each_entry_safe() for OOB skb. [0]\n\nsyzbot demonstrated that the list_for_each_entry_safe() was not actually\nsafe in this case.\n\nA single skb could have references for multiple sockets. If we free such\na skb in the list_for_each_entry_safe(), the current and next sockets could\nbe unlinked in a single iteration.\n\nunix_notinflight() uses list_del_init() to unlink the socket, so the\nprefetched next socket forms a loop itself and list_for_each_entry_safe()\nnever stops.\n\nHere, we must use while() and make sure we always fetch the first socket.\n\n[0]:\nSending NMI from CPU 0 to CPUs 1:\nNMI backtrace for cpu 1\nCPU: 1 PID: 5065 Comm: syz-executor236 Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\nRIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]\nRIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]\nRIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:207\nCode: cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 14 25 40 c2 03 00 <65> 8b 05 b4 7c 78 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74\nRSP: 0018:ffffc900033efa58 EFLAGS: 00000283\nRAX: ffff88807b077800 RBX: ffff88807b077800 RCX: 1ffffffff27b1189\nRDX: ffff88802a5a3b80 RSI: ffffffff8968488d RDI: ffff88807b077f70\nRBP: ffffc900033efbb0 R08: 0000000000000001 R09: fffffbfff27a900c\nR10: ffffffff93d48067 R11: ffffffff8ae000eb R12: ffff88807b077800\nR13: dffffc0000000000 R14: ffff88807b077e40 R15: 0000000000000001\nFS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000564f4fc1e3a8 CR3: 000000000d57a000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <NMI>\n </NMI>\n <TASK>\n unix_gc+0x563/0x13b0 net/unix/garbage.c:319\n unix_release_sock+0xa93/0xf80 net/unix/af_unix.c:683\n unix_release+0x91/0xf0 net/unix/af_unix.c:1064\n __sock_release+0xb0/0x270 net/socket.c:659\n sock_close+0x1c/0x30 net/socket.c:1421\n __fput+0x270/0xb80 fs/file_table.c:376\n task_work_run+0x14f/0x250 kernel/task_work.c:180\n exit_task_work include/linux/task_work.h:38 [inline]\n do_exit+0xa8a/0x2ad0 kernel/exit.c:871\n do_group_exit+0xd4/0x2a0 kernel/exit.c:1020\n __do_sys_exit_group kernel/exit.c:1031 [inline]\n __se_sys_exit_group kernel/exit.c:1029 [inline]\n __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x6f/0x77\nRIP: 0033:0x7f9d6cbdac09\nCode: Unable to access opcode bytes at 0x7f9d6cbdabdf.\nRSP: 002b:00007fff5952feb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9d6cbdac09\nRDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000\nRBP: 00007f9d6cc552b0 R08: ffffffffffffffb8 R09: 0000000000000006\nR10: 0000000000000006 R11: 0000000000000246 R12: 00007f9d6cc552b0\nR13: 0000000000000000 R14: 00007f9d6cc55d00 R15: 00007f9d6cbabe70\n </TASK>"}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T08:47:17.999Z"}}}, "cveMetadata": {"cveId": "CVE-2024-26780", "state": "PUBLISHED", "dateUpdated": "2024-12-19T08:47:17.999Z", "dateReserved": "2024-02-19T14:20:24.177Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-04-04T08:20:15.120Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Fix task hung while purging oob_skb in GC.\n\nsyzbot reported a task hung; at the same time, GC was looping infinitely\nin list_for_each_entry_safe() for OOB skb. [0]\n\nsyzbot demonstrated that the list_for_each_entry_safe() was not actually\nsafe in this case.\n\nA single skb could have references for multiple sockets. If we free such\na skb in the list_for_each_entry_safe(), the current and next sockets could\nbe unlinked in a single iteration.\n\nunix_notinflight() uses list_del_init() to unlink the socket, so the\nprefetched next socket forms a loop itself and list_for_each_entry_safe()\nnever stops.\n\nHere, we must use while() and make sure we always fetch the first socket.\n\n[0]:\nSending NMI from CPU 0 to CPUs 1:\nNMI backtrace for cpu 1\nCPU: 1 PID: 5065 Comm: syz-executor236 Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\nRIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]\nRIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]\nRIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:207\nCode: cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 14 25 40 c2 03 00 <65> 8b 05 b4 7c 78 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74\nRSP: 0018:ffffc900033efa58 EFLAGS: 00000283\nRAX: ffff88807b077800 RBX: ffff88807b077800 RCX: 1ffffffff27b1189\nRDX: ffff88802a5a3b80 RSI: ffffffff8968488d RDI: ffff88807b077f70\nRBP: ffffc900033efbb0 R08: 0000000000000001 R09: fffffbfff27a900c\nR10: ffffffff93d48067 R11: ffffffff8ae000eb R12: ffff88807b077800\nR13: dffffc0000000000 R14: ffff88807b077e40 R15: 0000000000000001\nFS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000564f4fc1e3a8 CR3: 000000000d57a000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <NMI>\n </NMI>\n <TASK>\n unix_gc+0x563/0x13b0 net/unix/garbage.c:319\n unix_release_sock+0xa93/0xf80 net/unix/af_unix.c:683\n unix_release+0x91/0xf0 net/unix/af_unix.c:1064\n __sock_release+0xb0/0x270 net/socket.c:659\n sock_close+0x1c/0x30 net/socket.c:1421\n __fput+0x270/0xb80 fs/file_table.c:376\n task_work_run+0x14f/0x250 kernel/task_work.c:180\n exit_task_work include/linux/task_work.h:38 [inline]\n do_exit+0xa8a/0x2ad0 kernel/exit.c:871\n do_group_exit+0xd4/0x2a0 kernel/exit.c:1020\n __do_sys_exit_group kernel/exit.c:1031 [inline]\n __se_sys_exit_group kernel/exit.c:1029 [inline]\n __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x6f/0x77\nRIP: 0033:0x7f9d6cbdac09\nCode: Unable to access opcode bytes at 0x7f9d6cbdabdf.\nRSP: 002b:00007fff5952feb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9d6cbdac09\nRDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000\nRBP: 00007f9d6cc552b0 R08: ffffffffffffffb8 R09: 0000000000000006\nR10: 0000000000000006 R11: 0000000000000246 R12: 00007f9d6cc552b0\nR13: 0000000000000000 R14: 00007f9d6cc55d00 R15: 00007f9d6cbabe70\n </TASK>"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: af_unix: se corrigi\u00f3 la tarea bloqueada al purgar oob_skb en GC. syzbot inform\u00f3 que se hab\u00eda colgado una tarea; al mismo tiempo, GC hac\u00eda un bucle infinito en list_for_each_entry_safe() para OOB skb. [0] syzbot demostr\u00f3 que list_for_each_entry_safe() en realidad no era seguro en este caso. Un solo skb podr\u00eda tener referencias para m\u00faltiples sockets. Si liberamos dicho skb en list_for_each_entry_safe(), los sockets actual y siguiente podr\u00edan desvincularse en una sola iteraci\u00f3n. unix_notinflight() usa list_del_init() para desvincular el socket, por lo que el siguiente socket precargado forma un bucle y list_for_each_entry_safe() nunca se detiene. Aqu\u00ed, debemos usar while() y asegurarnos de buscar siempre el primer socket. [0]: Env\u00edo de NMI desde la CPU 0 a las CPU 1: seguimiento de NMI para la CPU 1 CPU: 1 PID: 5065 Comm: syz-executor236 Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 25/01/2024 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [en l\u00ednea] RIP: 0010:check_kcov_mode kernel/kcov.c:173 [en l\u00ednea] RIP : 0010:__sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:207 C\u00f3digo: cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 14 25 40 c2 03 00 &lt;65&gt; 8b 05 b4 7c 78 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 RSP: 0018:ffffc900033efa58 EFLAGS: 00000283 RAX: ffff88807b077800 RBX: ffff88807b077800 RCX: 1ffffffff27b1189 RDX: ffff88802a5a3b80 RSI: ffffffff8968488d RDI: ffff88807b077f70 RBP: ffffc900033efbb0 R08: 00000000000000001 R09: ffffbfff27a900c R10: ffffffff93d48067 R11: ffffffff8ae000eb R12: ffff88807b077800 R13: dffffc0000000000 R14: ffff88807b077e40 R15: 00000000000000001 FS: 0000000000000000(0000) GS:ffff888 0b9500000(0000) knlGS: 0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000564f4fc1e3a8 CR3: 000000000d57a000 CR4: 00000000003506f0 DR0: 00 00000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas: unix_gc+0x563/0x13b0 net/unix/garbage.c:319 unix_release_sock+0xa93/0xf80 net/unix/af_unix.c:683 unix_release+0x91/0xf0 net/unix/af_unix.c:1064 __sock_release+0xb0/0x270 net/socket.c:659 sock_close+0x1c/0x30 net/socket.c:1421 __fput+0x270/0xb80 fs/file_table.c:376 task_work_run+0x14f/0x250 kernel/task_work.c:180 exit_task_work include/linux/task_work. h:38 [en l\u00ednea] do_exit+0xa8a/0x2ad0 kernel/exit.c:871 do_group_exit+0xd4/0x2a0 kernel/exit.c:1020 __do_sys_exit_group kernel/exit.c:1031 [en l\u00ednea] __se_sys_exit_group kernel/exit.c:1029 [ en l\u00ednea] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x6f/ 0x77 RIP: 0033:0x7f9d6cbdac09 C\u00f3digo: No se puede acceder a los bytes del c\u00f3digo de operaci\u00f3n en 0x7f9d6cbdabdf. RSP: 002b:00007fff5952feb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000000000000 RCX: 00007f9d6cbdac09 RDX: 00000000 0000003c RSI: 00000000000000e7 RDI: 00000000000000000 RBP: 00007f9d6cc552b0 R08: ffffffffffffffffb8 R09: 0000000000000006 R10: 00000000000000006 R1 1: 0000000000000246 R12: 00007f9d6cc552b0 R13: 0000000000000000 R14: 00007f9d6cc55d00 R15: 00007f9d6cbabe70 "}], "id": "CVE-2024-26780", "lastModified": "2024-11-21T09:03:03.370", "metrics": {}, "published": "2024-04-04T09:15:07.903", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/25236c91b5ab4a26a56ba2e79b8060cf4e047839"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2a3d40b4025fcfe51b04924979f1653993b17669"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/36f7371de977f805750748e80279be7e370df85c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/69e0f04460f4037e01e29f0d9675544f62aafca3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cb8890318dde26fc89c6ea67d6e9070ab50b6e91"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/25236c91b5ab4a26a56ba2e79b8060cf4e047839"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/2a3d40b4025fcfe51b04924979f1653993b17669"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/36f7371de977f805750748e80279be7e370df85c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/69e0f04460f4037e01e29f0d9675544f62aafca3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/cb8890318dde26fc89c6ea67d6e9070ab50b6e91"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: af_unix: Fix task hung while purging oob_skb in GC.", "id": "2273474", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2273474"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-400", "details": ["In the Linux kernel, the following vulnerability has been resolved:\naf_unix: Fix task hung while purging oob_skb in GC.\nsyzbot reported a task hung; at the same time, GC was looping infinitely\nin list_for_each_entry_safe() for OOB skb. [0]\nsyzbot demonstrated that the list_for_each_entry_safe() was not actually\nsafe in this case.\nA single skb could have references for multiple sockets. If we free such\na skb in the list_for_each_entry_safe(), the current and next sockets could\nbe unlinked in a single iteration.\nunix_notinflight() uses list_del_init() to unlink the socket, so the\nprefetched next socket forms a loop itself and list_for_each_entry_safe()\nnever stops.\nHere, we must use while() and make sure we always fetch the first socket.\n[0]:\nSending NMI from CPU 0 to CPUs 1:\nNMI backtrace for cpu 1\nCPU: 1 PID: 5065 Comm: syz-executor236 Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\nRIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]\nRIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]\nRIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:207\nCode: cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 14 25 40 c2 03 00 <65> 8b 05 b4 7c 78 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74\nRSP: 0018:ffffc900033efa58 EFLAGS: 00000283\nRAX: ffff88807b077800 RBX: ffff88807b077800 RCX: 1ffffffff27b1189\nRDX: ffff88802a5a3b80 RSI: ffffffff8968488d RDI: ffff88807b077f70\nRBP: ffffc900033efbb0 R08: 0000000000000001 R09: fffffbfff27a900c\nR10: ffffffff93d48067 R11: ffffffff8ae000eb R12: ffff88807b077800\nR13: dffffc0000000000 R14: ffff88807b077e40 R15: 0000000000000001\nFS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000564f4fc1e3a8 CR3: 000000000d57a000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n<NMI>\n</NMI>\n<TASK>\nunix_gc+0x563/0x13b0 net/unix/garbage.c:319\nunix_release_sock+0xa93/0xf80 net/unix/af_unix.c:683\nunix_release+0x91/0xf0 net/unix/af_unix.c:1064\n__sock_release+0xb0/0x270 net/socket.c:659\nsock_close+0x1c/0x30 net/socket.c:1421\n__fput+0x270/0xb80 fs/file_table.c:376\ntask_work_run+0x14f/0x250 kernel/task_work.c:180\nexit_task_work include/linux/task_work.h:38 [inline]\ndo_exit+0xa8a/0x2ad0 kernel/exit.c:871\ndo_group_exit+0xd4/0x2a0 kernel/exit.c:1020\n__do_sys_exit_group kernel/exit.c:1031 [inline]\n__se_sys_exit_group kernel/exit.c:1029 [inline]\n__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x6f/0x77\nRIP: 0033:0x7f9d6cbdac09\nCode: Unable to access opcode bytes at 0x7f9d6cbdabdf.\nRSP: 002b:00007fff5952feb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9d6cbdac09\nRDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000\nRBP: 00007f9d6cc552b0 R08: ffffffffffffffb8 R09: 0000000000000006\nR10: 0000000000000006 R11: 0000000000000246 R12: 00007f9d6cc552b0\nR13: 0000000000000000 R14: 00007f9d6cc55d00 R15: 00007f9d6cbabe70\n</TASK>", "A flaw was found in the Linux kernel's `af_unix` subsystem where tasks could hang while purging out-of-bounds sockets during garbage collection. This issue could potentially lead to system instability."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-26780", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-04-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26780\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26780\nhttps://lore.kernel.org/linux-cve-announce/2024040458-CVE-2024-26780-9951@gregkh/T"], "statement": "Red Hat Enterprise Linux is not vulnerable to this CVE, as it does not affect the versions or configurations of the Linux kernel used in its distributions.", "threat_severity": "Moderate", "upstream_fix": "kernel 6.1.81, kernel 6.6.21, kernel 6.7.9"}