248 lines
12 KiB
JSON
248 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-99256",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:25:14.404Z",
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"datePublished": "2026-11-03T11:25:14.077Z",
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"dateUpdated": "2026-11-03T11:40:45.109Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-11-03T11:40:45.109Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm cache: fix issue with background work locking\n\ndm cache used a rw_semaphore for background_work_lock. Write locks on\nrw_semaphores have strict owner semantics, but there was no guarantee\nthat the process that locked background_work_lock was the same process\nthat unlocked it. This can be easily seen using a kernel compiled with\nCONFIG_DEBUG_RWSEMS. Given a dm cache device <cache>, run: 'dmsetup\nsuspend <cache> && dmsetup resume <cache>'. This will trigger a kernel\nwarning:\n\nDEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE))\n\ntriggered by cache_resume(). To fix this, switch from a rw_semaphore to\na spinlock and a wait queue. dm cache already has a wait queue and\nassociated counter, migration_wait and nr_allocated_migrations, that was\ngetting woken up when background work was getting completed, but wasn't\nactually used by anything. This is replaced by the background_work queue\nand counter."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/md/dm-cache-target.c"
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],
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"versions": [
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{
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"version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f",
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"lessThan": "0c7a8cad7c96012a9157a189649e569d0390f384",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f",
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"lessThan": "f5db935d257023c3ef410bd39163b949b0e5a55d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f",
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"lessThan": "6290507ecc0dd6dd40759729cbbbd49b1d2a63c4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f",
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"lessThan": "8433fd005c25fd127021f67c9144a879fb585572",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f",
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"lessThan": "2f2cfa16dd0f4179bb988139dd37d00a42324f6c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f",
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"lessThan": "73df2ff409f3db95029982fe3656329568e3715d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f",
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"lessThan": "104f09e02038b0fc6bbb718b3976af029e15c1d0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f",
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"lessThan": "bc9781c0247de107876f32929f1637db93a42b34",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/md/dm-cache-target.c"
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],
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"versions": [
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{
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"version": "4.12",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.12",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.273",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.224",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.161",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.115",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.59",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.13",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.12",
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"versionEndExcluding": "5.10.273"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.12",
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"versionEndExcluding": "5.15.224"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.12",
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"versionEndExcluding": "6.1.191"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.12",
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"versionEndExcluding": "6.6.161"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.12",
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"versionEndExcluding": "6.12.115"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.12",
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"versionEndExcluding": "6.18.59"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.12",
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"versionEndExcluding": "7.2.13"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.12",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/0c7a8cad7c96012a9157a189649e569d0390f384"
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},
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{
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"url": "https://git.kernel.org/stable/c/f5db935d257023c3ef410bd39163b949b0e5a55d"
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},
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{
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"url": "https://git.kernel.org/stable/c/6290507ecc0dd6dd40759729cbbbd49b1d2a63c4"
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},
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{
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"url": "https://git.kernel.org/stable/c/8433fd005c25fd127021f67c9144a879fb585572"
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},
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{
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"url": "https://git.kernel.org/stable/c/2f2cfa16dd0f4179bb988139dd37d00a42324f6c"
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},
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{
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"url": "https://git.kernel.org/stable/c/73df2ff409f3db95029982fe3656329568e3715d"
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},
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{
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"url": "https://git.kernel.org/stable/c/104f09e02038b0fc6bbb718b3976af029e15c1d0"
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},
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{
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"url": "https://git.kernel.org/stable/c/bc9781c0247de107876f32929f1637db93a42b34"
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}
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],
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"title": "dm cache: fix issue with background work locking",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |