| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "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" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "3.13", |
| "versionEndExcluding": "4.19.324" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
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| "versionEndExcluding": "5.4.286" |
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| }, |
| { |
| "vulnerable": true, |
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| "versionStartIncluding": "3.13", |
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| { |
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| } |
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| ] |
| } |
| ], |
| "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-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2024-50279", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
