227 lines
11 KiB
JSON
227 lines
11 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-2026-93795",
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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": "2026-09-18T17:59:28.789Z",
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"datePublished": "2026-09-24T16:02:28.654Z",
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"dateUpdated": "2026-10-03T10:57:30.314Z"
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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": "2026-10-03T10:57:30.314Z"
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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\nblk-cgroup: fix leaks and online flag on radix_tree_insert failure\n\nWhen radix_tree_insert() fails in blkg_create(), the error path has two\nissues:\n\n1. blkg->online is set to true unconditionally, even when the blkg was\n never fully inserted. Move the assignment inside the success block.\n\n2. The error path calls blkg_put() without first calling\n percpu_ref_kill(). Because the refcount is still in percpu mode,\n percpu_ref_put() only does this_cpu_sub() without checking for zero,\n so blkg_release() is never triggered. This permanently leaks the\n blkg memory, its percpu iostat, policy data, the parent blkg\n reference, and the cgroup css reference — the latter preventing the\n cgroup from ever being destroyed.\n\nFix by replacing blkg_put() with percpu_ref_kill(), matching the pattern\nused in blkg_destroy()."
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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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"block/blk-cgroup.c"
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],
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"versions": [
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{
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"version": "7fcf2b033b84e261dca283bc2911aaea4b07b525",
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"lessThan": "0f840db042caee9d2f3dcdcf97d6674f6e4c1e30",
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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": "7fcf2b033b84e261dca283bc2911aaea4b07b525",
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"lessThan": "f53945d7c712efe63fadbcc5ffed6370871fd0d3",
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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": "7fcf2b033b84e261dca283bc2911aaea4b07b525",
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"lessThan": "ada8270ccdb6f212da5eb22614c28ea418746a4a",
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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": "7fcf2b033b84e261dca283bc2911aaea4b07b525",
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"lessThan": "c3650be82ef6e7af13b79b2d10a7363bdf54aa7f",
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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": "7fcf2b033b84e261dca283bc2911aaea4b07b525",
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"lessThan": "6e85f02d45b5977c0326a8d854c6db878aa6b34a",
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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": "7fcf2b033b84e261dca283bc2911aaea4b07b525",
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"lessThan": "4c0d150fb98ea40760611979f4e664c244b20966",
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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": "7fcf2b033b84e261dca283bc2911aaea4b07b525",
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"lessThan": "dbbca20764382b4d411ec2918f4e278ffe547acc",
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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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"block/blk-cgroup.c"
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],
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"versions": [
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{
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"version": "5.0",
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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": "5.0",
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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": "5.10.271",
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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": "5.15.222",
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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": "6.1.189",
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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": "6.6.158",
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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": "6.12.111",
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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": "6.18.53",
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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",
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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": "5.0",
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"versionEndExcluding": "5.10.271"
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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": "5.0",
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"versionEndExcluding": "5.15.222"
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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": "5.0",
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"versionEndExcluding": "6.1.189"
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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": "5.0",
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"versionEndExcluding": "6.6.158"
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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": "5.0",
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"versionEndExcluding": "6.12.111"
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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": "5.0",
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"versionEndExcluding": "6.18.53"
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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": "5.0",
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"versionEndExcluding": "7.2"
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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/0f840db042caee9d2f3dcdcf97d6674f6e4c1e30"
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},
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{
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"url": "https://git.kernel.org/stable/c/f53945d7c712efe63fadbcc5ffed6370871fd0d3"
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},
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{
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"url": "https://git.kernel.org/stable/c/ada8270ccdb6f212da5eb22614c28ea418746a4a"
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},
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{
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"url": "https://git.kernel.org/stable/c/c3650be82ef6e7af13b79b2d10a7363bdf54aa7f"
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},
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{
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"url": "https://git.kernel.org/stable/c/6e85f02d45b5977c0326a8d854c6db878aa6b34a"
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},
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{
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"url": "https://git.kernel.org/stable/c/4c0d150fb98ea40760611979f4e664c244b20966"
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},
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{
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"url": "https://git.kernel.org/stable/c/dbbca20764382b4d411ec2918f4e278ffe547acc"
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}
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],
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"title": "blk-cgroup: fix leaks and online flag on radix_tree_insert failure",
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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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} |