261 lines
13 KiB
JSON
261 lines
13 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-2026-52977",
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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": "2026-06-09T07:44:35.376Z",
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"datePublished": "2026-06-24T16:28:53.937Z",
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"dateUpdated": "2026-11-06T16:23:52.193Z"
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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": "2026-08-19T16:28:04.076Z"
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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\nfutex: Prevent lockup in requeue-PI during signal/ timeout wakeup\n\nDuring wait-requeue-pi (task A) and requeue-PI (task B) the following\nrace can happen:\n\n Task A Task B\n futex_wait_requeue_pi()\n futex_setup_timer()\n futex_do_wait()\n futex_requeue()\n CLASS(hb, hb1)(&key1);\n CLASS(hb, hb2)(&key2);\n *timeout*\n futex_requeue_pi_wakeup_sync()\n requeue_state = Q_REQUEUE_PI_IGNORE\n\n *blocks on hb->lock*\n\n futex_proxy_trylock_atomic()\n futex_requeue_pi_prepare()\n Q_REQUEUE_PI_IGNORE => -EAGAIN\n double_unlock_hb(hb1, hb2)\n *retry*\n\nTask B acquires both hb locks and attempts to acquire the PI-lock of the\ntop most waiter (task B). Task A is leaving early due to a signal/\ntimeout and started removing itself from the queue. It updates its\nrequeue_state but can not remove it from the list because this requires\nthe hb lock which is owned by task B.\n\nUsually task A is able to swoop the lock after task B unlocked it.\nHowever if task B is of higher priority then task A may not be able to\nwake up in time and acquire the lock before task B gets it again.\nEspecially on a UP system where A is never scheduled.\n\nAs a result task A blocks on the lock and task B busy loops, trying to\nmake progress but live locks the system instead. Tragic.\n\nThis can be fixed by removing the top most waiter from the list in this\ncase. This allows task B to grab the next top waiter (if any) in the\nnext iteration and make progress.\n\nRemove the top most waiter if futex_requeue_pi_prepare() fails.\nLet the waiter conditionally remove itself from the list in\nhandle_early_requeue_pi_wakeup()."
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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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"kernel/futex/requeue.c"
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],
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"versions": [
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{
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"version": "07d91ef510fb16a2e0ca7453222105835b7ba3b8",
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"lessThan": "e5dbae3572757cecc3d3ec7cf96cbcc9cd9f016c",
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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": "07d91ef510fb16a2e0ca7453222105835b7ba3b8",
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"lessThan": "4e0ed44e51727d56244a822ab941efe507c47966",
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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": "07d91ef510fb16a2e0ca7453222105835b7ba3b8",
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"lessThan": "e3f95b1ba242e37093305812df7fdbe7288a43ac",
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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": "07d91ef510fb16a2e0ca7453222105835b7ba3b8",
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"lessThan": "0aacb6d18f76552e3e0ee25d9f40d21b3486f4cf",
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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": "07d91ef510fb16a2e0ca7453222105835b7ba3b8",
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"lessThan": "69a7cfc66405aeaa2483147653d031b3592ffc9c",
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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": "07d91ef510fb16a2e0ca7453222105835b7ba3b8",
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"lessThan": "0304d60abb9dcc02bc7fe6d1850f4ca206e8f1a0",
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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": "07d91ef510fb16a2e0ca7453222105835b7ba3b8",
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"lessThan": "bc7304f3ae20972d11db6e0b1b541c63feda5f05",
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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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"kernel/futex/requeue.c"
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],
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"versions": [
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{
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"version": "5.15",
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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": "5.15",
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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": "5.15.216",
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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": "6.1.175",
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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": "6.6.141",
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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": "6.12.91",
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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": "6.18.33",
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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": "7.0.10",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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": "5.15",
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"versionEndExcluding": "5.15.216"
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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": "5.15",
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"versionEndExcluding": "6.1.175"
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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": "5.15",
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"versionEndExcluding": "6.6.141"
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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": "5.15",
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"versionEndExcluding": "6.12.91"
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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": "5.15",
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"versionEndExcluding": "6.18.33"
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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": "5.15",
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"versionEndExcluding": "7.0.10"
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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": "5.15",
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"versionEndExcluding": "7.1"
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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/e5dbae3572757cecc3d3ec7cf96cbcc9cd9f016c"
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},
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{
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"url": "https://git.kernel.org/stable/c/4e0ed44e51727d56244a822ab941efe507c47966"
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},
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{
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"url": "https://git.kernel.org/stable/c/e3f95b1ba242e37093305812df7fdbe7288a43ac"
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},
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{
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"url": "https://git.kernel.org/stable/c/0aacb6d18f76552e3e0ee25d9f40d21b3486f4cf"
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},
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{
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"url": "https://git.kernel.org/stable/c/69a7cfc66405aeaa2483147653d031b3592ffc9c"
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},
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{
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"url": "https://git.kernel.org/stable/c/0304d60abb9dcc02bc7fe6d1850f4ca206e8f1a0"
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},
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{
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"url": "https://git.kernel.org/stable/c/bc7304f3ae20972d11db6e0b1b541c63feda5f05"
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}
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],
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"title": "futex: Prevent lockup in requeue-PI during signal/ timeout wakeup",
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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-2026-52977",
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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": "2026-11-06T16:15:36.338487Z"
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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": "2026-11-06T16:23:52.193Z"
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}
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}
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]
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}
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} |