{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43197", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.992Z", "datePublished": "2026-05-06T11:28:04.829Z", "dateUpdated": "2026-05-06T11:28:04.829Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-06T11:28:04.829Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetconsole: avoid OOB reads, msg is not nul-terminated\n\nmsg passed to netconsole from the console subsystem is not guaranteed\nto be nul-terminated. Before recent\ncommit 7eab73b18630 (\"netconsole: convert to NBCON console infrastructure\")\nthe message would be placed in printk_shared_pbufs, a static global\nbuffer, so KASAN had harder time catching OOB accesses. Now we see:\n\n printk: console [netcon_ext0] enabled\n BUG: KASAN: slab-out-of-bounds in string+0x1f7/0x240\n Read of size 1 at addr ffff88813b6d4c00 by task pr/netcon_ext0/594\n\n CPU: 65 UID: 0 PID: 594 Comm: pr/netcon_ext0 Not tainted 6.19.0-11754-g4246fd6547c9\n Call Trace:\n kasan_report+0xe4/0x120\n string+0x1f7/0x240\n vsnprintf+0x655/0xba0\n scnprintf+0xba/0x120\n netconsole_write+0x3fe/0xa10\n nbcon_emit_next_record+0x46e/0x860\n nbcon_kthread_func+0x623/0x750\n\n Allocated by task 1:\n nbcon_alloc+0x1ea/0x450\n register_console+0x26b/0xe10\n init_netconsole+0xbb0/0xda0\n\n The buggy address belongs to the object at ffff88813b6d4000\n which belongs to the cache kmalloc-4k of size 4096\n The buggy address is located 0 bytes to the right of\n allocated 3072-byte region [ffff88813b6d4000, ffff88813b6d4c00)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/netconsole.c"], "versions": [{"version": "c62c0a17f9b7398022f9eebe547878033264f81f", "lessThan": "3126a2f98beaec5a554a1fb31c46db1e8542665e", "status": "affected", "versionType": "git"}, {"version": "c62c0a17f9b7398022f9eebe547878033264f81f", "lessThan": "74ab1456eaa3b2eb986138f9e1f4cb37e73b6f58", "status": "affected", "versionType": "git"}, {"version": "c62c0a17f9b7398022f9eebe547878033264f81f", "lessThan": "82aec772fca2223bc5774bd9af486fd95766e578", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/netconsole.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.6", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.19.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3126a2f98beaec5a554a1fb31c46db1e8542665e"}, {"url": "https://git.kernel.org/stable/c/74ab1456eaa3b2eb986138f9e1f4cb37e73b6f58"}, {"url": "https://git.kernel.org/stable/c/82aec772fca2223bc5774bd9af486fd95766e578"}], "title": "netconsole: avoid OOB reads, msg is not nul-terminated", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetconsole: avoid OOB reads, msg is not nul-terminated\n\nmsg passed to netconsole from the console subsystem is not guaranteed\nto be nul-terminated. Before recent\ncommit 7eab73b18630 (\"netconsole: convert to NBCON console infrastructure\")\nthe message would be placed in printk_shared_pbufs, a static global\nbuffer, so KASAN had harder time catching OOB accesses. Now we see:\n\n printk: console [netcon_ext0] enabled\n BUG: KASAN: slab-out-of-bounds in string+0x1f7/0x240\n Read of size 1 at addr ffff88813b6d4c00 by task pr/netcon_ext0/594\n\n CPU: 65 UID: 0 PID: 594 Comm: pr/netcon_ext0 Not tainted 6.19.0-11754-g4246fd6547c9\n Call Trace:\n kasan_report+0xe4/0x120\n string+0x1f7/0x240\n vsnprintf+0x655/0xba0\n scnprintf+0xba/0x120\n netconsole_write+0x3fe/0xa10\n nbcon_emit_next_record+0x46e/0x860\n nbcon_kthread_func+0x623/0x750\n\n Allocated by task 1:\n nbcon_alloc+0x1ea/0x450\n register_console+0x26b/0xe10\n init_netconsole+0xbb0/0xda0\n\n The buggy address belongs to the object at ffff88813b6d4000\n which belongs to the cache kmalloc-4k of size 4096\n The buggy address is located 0 bytes to the right of\n allocated 3072-byte region [ffff88813b6d4000, ffff88813b6d4c00)"}], "id": "CVE-2026-43197", "lastModified": "2026-05-06T13:07:51.607", "metrics": {}, "published": "2026-05-06T12:16:38.740", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3126a2f98beaec5a554a1fb31c46db1e8542665e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/74ab1456eaa3b2eb986138f9e1f4cb37e73b6f58"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/82aec772fca2223bc5774bd9af486fd95766e578"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: netconsole: avoid OOB reads, msg is not nul-terminated", "id": "2467238", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467238"}, "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-170", "details": ["A flaw was found in the Linux kernel's netconsole component. The system processes messages from the console subsystem without ensuring they are properly terminated, which can lead to an out-of-bounds read. This vulnerability allows a local attacker to trigger a kernel crash, resulting in a Denial of Service (DoS) for the affected system."], "name": "CVE-2026-43197", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43197\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43197\nhttps://lore.kernel.org/linux-cve-announce/2026050644-CVE-2026-43197-37f5@gregkh/T"], "threat_severity": "Moderate"}