{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-50279", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.983Z", "datePublished": "2024-11-19T01:30:20.712Z", "dateUpdated": "2024-12-19T09:37:11.114Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T09:37:11.114Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm cache: fix out-of-bounds access to the dirty bitset when resizing\n\ndm-cache checks the dirty bits of the cache blocks to be dropped when\nshrinking the fast device, but an index bug in bitset iteration causes\nout-of-bounds access.\n\nReproduce steps:\n\n1. create a cache device of 1024 cache blocks (128 bytes dirty bitset)\n\ndmsetup create cmeta --table \"0 8192 linear /dev/sdc 0\"\ndmsetup create cdata --table \"0 131072 linear /dev/sdc 8192\"\ndmsetup create corig --table \"0 524288 linear /dev/sdc 262144\"\ndd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 oflag=direct\ndmsetup create cache --table \"0 524288 cache /dev/mapper/cmeta \\\n/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0\"\n\n2. shrink the fast device to 512 cache blocks, triggering out-of-bounds\n access to the dirty bitset (offset 0x80)\n\ndmsetup suspend cache\ndmsetup reload cdata --table \"0 65536 linear /dev/sdc 8192\"\ndmsetup resume cdata\ndmsetup resume cache\n\nKASAN reports:\n\n BUG: KASAN: vmalloc-out-of-bounds in cache_preresume+0x269/0x7b0\n Read of size 8 at addr ffffc900000f3080 by task dmsetup/131\n\n (...snip...)\n The buggy address belongs to the virtual mapping at\n [ffffc900000f3000, ffffc900000f5000) created by:\n cache_ctr+0x176a/0x35f0\n\n (...snip...)\n Memory state around the buggy address:\n ffffc900000f2f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ffffc900000f3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n >ffffc900000f3080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ^\n ffffc900000f3100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ffffc900000f3180: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n\nFix by making the index post-incremented."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/dm-cache-target.c"], "versions": [{"version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498", "lessThan": "4fa4feb873cea0e9d6ff883b37cca6f33169d8b4", "status": "affected", "versionType": "git"}, {"version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498", "lessThan": "8501e38dc9e0060814c4085815fc83da3e6d43bf", "status": "affected", "versionType": "git"}, {"version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498", "lessThan": "ee1f74925717ab36f6a091104c170639501ce818", "status": "affected", "versionType": "git"}, {"version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498", "lessThan": "ff1dd8a04c30e8d4e2fd5c83198ca672eb6a9e7f", "status": "affected", "versionType": "git"}, {"version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498", "lessThan": "56507203e1b6127967ec2b51fb0b23a0d4af1334", "status": "affected", "versionType": "git"}, {"version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498", "lessThan": "e57648ce325fa405fe6bbd0e6a618ced7c301a2d", "status": "affected", "versionType": "git"}, {"version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498", "lessThan": "3b02c40ff10fdf83cc545850db208de855ebe22c", "status": "affected", "versionType": "git"}, {"version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498", "lessThan": "792227719725497ce10a8039803bec13f89f8910", "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/md/dm-cache-target.c"], "versions": [{"version": "3.13", "status": "affected"}, {"version": "0", "lessThan": "3.13", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.324", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.286", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.230", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.172", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.117", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.61", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.8", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/4fa4feb873cea0e9d6ff883b37cca6f33169d8b4"}, {"url": "https://git.kernel.org/stable/c/8501e38dc9e0060814c4085815fc83da3e6d43bf"}, {"url": "https://git.kernel.org/stable/c/ee1f74925717ab36f6a091104c170639501ce818"}, {"url": "https://git.kernel.org/stable/c/ff1dd8a04c30e8d4e2fd5c83198ca672eb6a9e7f"}, {"url": "https://git.kernel.org/stable/c/56507203e1b6127967ec2b51fb0b23a0d4af1334"}, {"url": "https://git.kernel.org/stable/c/e57648ce325fa405fe6bbd0e6a618ced7c301a2d"}, {"url": "https://git.kernel.org/stable/c/3b02c40ff10fdf83cc545850db208de855ebe22c"}, {"url": "https://git.kernel.org/stable/c/792227719725497ce10a8039803bec13f89f8910"}], "title": "dm cache: fix out-of-bounds access to the dirty bitset when resizing", "x_generator": {"engine": "bippy-5f407fcff5a0"}}}}

{}

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Reproducir los pasos: 1. crear un dispositivo de cach\u00e9 de 1024 bloques de cach\u00e9 (128 bytes de bitset sucio) dmsetup create cmeta --table \"0 8192 linear /dev/sdc 0\" dmsetup create cdata --table \"0 131072 linear /dev/sdc 8192\" dmsetup create corig --table \"0 524288 linear /dev/sdc 262144\" dd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 oflag=direct dmsetup create cache --table \"0 524288 cache /dev/mapper/cmeta \\ /dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0\" 2. reducir el dispositivo r\u00e1pido a 512 bloques de cach\u00e9, lo que activa el acceso fuera de los l\u00edmites al bitset sucio. bitset (offset 0x80) dmsetup suspend cache dmsetup reload cdata --table \"0 65536 linear /dev/sdc 8192\" dmsetup resume cdata dmsetup resume cache KASAN informa: ERROR: KASAN: vmalloc-out-of-bounds en cache_preresume+0x269/0x7b0 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffffc900000f3080 por la tarea dmsetup/131 (...snip...) La direcci\u00f3n con errores pertenece al mapeo virtual en [ffffc900000f3000, ffffc900000f5000) creado por: cache_ctr+0x176a/0x35f0 (...snip...) Estado de la memoria alrededor de la direcci\u00f3n con errores: ffffc900000f2f80: f8 f8 f8 f8 f8 f8 ..."}], "id": "CVE-2024-50279", "lastModified": "2024-11-27T16:01:09.817", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "[email protected]", "type": "Primary"}]}, "published": "2024-11-19T02:16:30.210", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3b02c40ff10fdf83cc545850db208de855ebe22c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4fa4feb873cea0e9d6ff883b37cca6f33169d8b4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/56507203e1b6127967ec2b51fb0b23a0d4af1334"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/792227719725497ce10a8039803bec13f89f8910"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8501e38dc9e0060814c4085815fc83da3e6d43bf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e57648ce325fa405fe6bbd0e6a618ced7c301a2d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ee1f74925717ab36f6a091104c170639501ce818"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ff1dd8a04c30e8d4e2fd5c83198ca672eb6a9e7f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: dm cache: fix out-of-bounds access to the dirty bitset when resizing", "id": "2327170", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2327170"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndm cache: fix out-of-bounds access to the dirty bitset when resizing\ndm-cache checks the dirty bits of the cache blocks to be dropped when\nshrinking the fast device, but an index bug in bitset iteration causes\nout-of-bounds access.\nReproduce steps:\n1. create a cache device of 1024 cache blocks (128 bytes dirty bitset)\ndmsetup create cmeta --table \"0 8192 linear /dev/sdc 0\"\ndmsetup create cdata --table \"0 131072 linear /dev/sdc 8192\"\ndmsetup create corig --table \"0 524288 linear /dev/sdc 262144\"\ndd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 oflag=direct\ndmsetup create cache --table \"0 524288 cache /dev/mapper/cmeta \\\n/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0\"\n2. shrink the fast device to 512 cache blocks, triggering out-of-bounds\naccess to the dirty bitset (offset 0x80)\ndmsetup suspend cache\ndmsetup reload cdata --table \"0 65536 linear /dev/sdc 8192\"\ndmsetup resume cdata\ndmsetup resume cache\nKASAN reports:\nBUG: KASAN: vmalloc-out-of-bounds in cache_preresume+0x269/0x7b0\nRead of size 8 at addr ffffc900000f3080 by task dmsetup/131\n(...snip...)\nThe buggy address belongs to the virtual mapping at\n[ffffc900000f3000, ffffc900000f5000) created by:\ncache_ctr+0x176a/0x35f0\n(...snip...)\nMemory state around the buggy address:\nffffc900000f2f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\nffffc900000f3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n>ffffc900000f3080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n^\nffffc900000f3100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\nffffc900000f3180: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\nFix by making the index post-incremented."], "name": "CVE-2024-50279", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-11-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50279\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50279\nhttps://lore.kernel.org/linux-cve-announce/2024111939-CVE-2024-50279-d3f9@gregkh/T"], "threat_severity": "Moderate"}