164 lines
7.6 KiB
JSON
164 lines
7.6 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-2026-93216",
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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": "2026-09-17T16:02:15.093Z",
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"datePublished": "2026-09-24T15:10:38.702Z",
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"dateUpdated": "2026-10-21T12:52:21.777Z"
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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": "2026-10-21T12:52:21.777Z"
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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\nmm/page_owner: use memcg_data snapshot to avoid TOCTOU in print_page_owner_memcg()\n\nprint_page_owner_memcg() reads page->memcg_data via READ_ONCE() at the\nstart to guard against tail pages and NULL data. However, it later\nre-reads page->memcg_data locklessly in two places:\n\n1: page_memcg_check(page)\n\n2: PageMemcgKmem(page) (via folio_memcg_kmem(), which includes\n VM_BUG_ON assertions for tail pages and MEMCG_DATA_OBJEXTS)\n\nIf the page is concurrently freed and reallocated as a THP tail page or\nslab page between these calls, the VM_BUG_ON assertions can trigger on\nCONFIG_DEBUG_VM=y builds, crashing the kernel.\n\nFix both TOCTOU issues by using the memcg_data snapshot throughout."
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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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"mm/page_owner.c"
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],
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"versions": [
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{
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"version": "fcf8935832b86d3437f00e732c6d0d4d2819d6a9",
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"lessThan": "e7c1923c5f30a6953f0540e3171d882ec17b05d3",
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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": "fcf8935832b86d3437f00e732c6d0d4d2819d6a9",
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"lessThan": "a4c940ab3f794f221a338c9431ad1ce0d73a2bea",
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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": "fcf8935832b86d3437f00e732c6d0d4d2819d6a9",
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"lessThan": "46761406e14381dc35f498c247a87565b87ea2ef",
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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": "fcf8935832b86d3437f00e732c6d0d4d2819d6a9",
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"lessThan": "90f095b816e25c6a9e4446d299bac5007fdcb3df",
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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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"mm/page_owner.c"
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],
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"versions": [
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{
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"version": "5.18",
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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": "5.18",
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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": "6.6.160",
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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": "6.12.114",
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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": "7.2.4",
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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": "5.18",
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"versionEndExcluding": "6.6.160"
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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": "5.18",
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"versionEndExcluding": "6.12.114"
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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": "5.18",
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"versionEndExcluding": "7.2.4"
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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": "5.18",
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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/e7c1923c5f30a6953f0540e3171d882ec17b05d3"
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},
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{
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"url": "https://git.kernel.org/stable/c/a4c940ab3f794f221a338c9431ad1ce0d73a2bea"
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},
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{
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"url": "https://git.kernel.org/stable/c/46761406e14381dc35f498c247a87565b87ea2ef"
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},
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{
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"url": "https://git.kernel.org/stable/c/90f095b816e25c6a9e4446d299bac5007fdcb3df"
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}
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],
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"title": "mm/page_owner: use memcg_data snapshot to avoid TOCTOU in print_page_owner_memcg()",
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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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} |