282 lines
14 KiB
JSON
282 lines
14 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-2026-64514",
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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": "2026-07-19T15:36:31.793Z",
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"datePublished": "2026-07-25T08:52:05.878Z",
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"dateUpdated": "2026-11-06T16:44:56.292Z"
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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": "2026-08-17T04:57:05.592Z"
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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\nuserfaultfd: gate must_wait writability check on pte_present()\n\nuserfaultfd_must_wait() and userfaultfd_huge_must_wait() read the PTE\nwithout taking the page table lock and then apply pte_write() /\nhuge_pte_write() to it. Those accessors decode bits from the present\nencoding only; on a swap or migration entry they read the offset bits that\nhappen to share the same position and return an undefined result.\n\nThe intent of the check is \"is this fault still WP-blocked?\". A\nnon-marker swap entry means the page is in transit -- the userfault\ncontext the original fault delivered against is no longer the same, and\nthe swap-in or migration completion path will re-deliver a fresh fault if\nuserspace still needs to handle it. Worst case under the current code the\ngarbage write bit says \"wait\", and the thread stays asleep until a\nUFFDIO_WAKE that may never arrive.\n\nGate the writability check on pte_present() so the lockless re-check only\ninspects present-PTE bits when the entry is actually present. The\nnon-present, non-marker case returns \"don't wait\" and lets the fault path\nretry."
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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/userfaultfd.c"
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],
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"versions": [
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{
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"version": "369cd2121be440543280b91056de187f625d0dbb",
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"lessThan": "a5700a4c1c9099ac2ac73fe8a09cf059972e0d2f",
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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": "369cd2121be440543280b91056de187f625d0dbb",
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"lessThan": "d4026417e8184d13850a0bad4d96ceb6ed9f7152",
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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": "369cd2121be440543280b91056de187f625d0dbb",
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"lessThan": "29e6f952c5fb7dc1d6b90fe5b7f36063d44ddae0",
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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": "369cd2121be440543280b91056de187f625d0dbb",
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"lessThan": "5f4dbdb0a87596214076b20b94f2b71b522170b3",
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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": "369cd2121be440543280b91056de187f625d0dbb",
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"lessThan": "a6e9a4939e359599701b1da351e84f72e021443a",
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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": "369cd2121be440543280b91056de187f625d0dbb",
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"lessThan": "60d696a037eeeedfb57756dfe7ec08a1587c8631",
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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": "369cd2121be440543280b91056de187f625d0dbb",
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"lessThan": "710183888174639a15fcec16cd1af766b8480bb7",
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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": "369cd2121be440543280b91056de187f625d0dbb",
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"lessThan": "8e80af52db652fbc41320eee45a4f73bc029faf2",
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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/userfaultfd.c"
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],
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"versions": [
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{
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"version": "4.11",
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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": "4.11",
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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": "5.10.261",
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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": "5.15.212",
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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": "6.1.178",
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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": "6.6.145",
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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": "6.12.96",
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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": "6.18.39",
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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": "7.1.4",
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"lessThanOrEqual": "7.1.*",
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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": "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": "4.11",
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"versionEndExcluding": "5.10.261"
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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": "4.11",
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"versionEndExcluding": "5.15.212"
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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": "4.11",
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"versionEndExcluding": "6.1.178"
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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": "4.11",
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"versionEndExcluding": "6.6.145"
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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": "4.11",
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"versionEndExcluding": "6.12.96"
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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": "4.11",
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"versionEndExcluding": "6.18.39"
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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": "4.11",
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"versionEndExcluding": "7.1.4"
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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": "4.11",
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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/a5700a4c1c9099ac2ac73fe8a09cf059972e0d2f"
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},
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{
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"url": "https://git.kernel.org/stable/c/d4026417e8184d13850a0bad4d96ceb6ed9f7152"
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},
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{
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"url": "https://git.kernel.org/stable/c/29e6f952c5fb7dc1d6b90fe5b7f36063d44ddae0"
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},
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{
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"url": "https://git.kernel.org/stable/c/5f4dbdb0a87596214076b20b94f2b71b522170b3"
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},
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{
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"url": "https://git.kernel.org/stable/c/a6e9a4939e359599701b1da351e84f72e021443a"
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},
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{
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"url": "https://git.kernel.org/stable/c/60d696a037eeeedfb57756dfe7ec08a1587c8631"
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},
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{
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"url": "https://git.kernel.org/stable/c/710183888174639a15fcec16cd1af766b8480bb7"
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},
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{
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"url": "https://git.kernel.org/stable/c/8e80af52db652fbc41320eee45a4f73bc029faf2"
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}
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],
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"title": "userfaultfd: gate must_wait writability check on pte_present()",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-64514",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-11-06T16:40:57.422475Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-06T16:44:56.292Z"
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}
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}
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]
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}
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} |