248 lines
13 KiB
JSON
248 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-2026-99179",
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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": "2026-09-25T10:25:14.399Z",
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"datePublished": "2026-10-28T10:35:32.734Z",
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"dateUpdated": "2026-10-30T12:42:42.438Z"
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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": "2026-10-30T12:42:42.438Z"
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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\nwatch_queue: Fix note pool publication race in watch_queue_set_size()\n\nThere is a race between watch_queue_set_size() and post_one_notification().\nwatch_queue_set_size() publishes wqueue->notes, notes_bitmap, nr_pages and\nnr_notes with plain stores, and post_one_notification() reads them with\nplain loads under a different lock, so nothing orders the four stores\nagainst the poster's loads: depending on the build, notes can be stored\nlast (gcc 14 on x86-64 does this). Since keyctl_watch_key() lets a watch\nattach to a queue before it is sized, post_one_notification() can already\nbe running on another CPU at that moment: it reads nr_notes > 0, passes\nits bounds check, and then reads notes while it is still NULL,\ndereferencing notes[0].\n\nAn unprivileged user triggers this reliably by watching one of its own\nkeys through a notification pipe and racing ioctl(IOC_WATCH_QUEUE_SET_SIZE)\non that pipe against keyctl(KEYCTL_SETPERM) on the key from another CPU,\ntriggering:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n RIP: 0010:post_one_notification.isra.0+0xa2/0x1e0\n Call Trace:\n __post_watch_notification+0x148/0x180\n keyctl_setperm_key+0x119/0x130\n do_syscall_64+0x108/0x4c0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n Kernel panic - not syncing: Fatal exception in interrupt\n\nFix this by publishing nr_notes last with smp_store_release(), and by\nreading it once with smp_load_acquire() in post_one_notification() before\nthe bitmap and the page array are touched. A poster that observes a\nnon-zero nr_notes then also observes the pool behind it; one that observes\nzero drops the notification as before."
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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/watch_queue.c"
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],
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"versions": [
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{
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"version": "c73be61cede5882f9605a852414db559c0ebedfd",
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"lessThan": "2137d487b25eefa862be70de489b64f4c679fe1f",
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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": "c73be61cede5882f9605a852414db559c0ebedfd",
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"lessThan": "6aaa6c1a1b61aae332d6e7e0083140b86ea51e14",
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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": "c73be61cede5882f9605a852414db559c0ebedfd",
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"lessThan": "4b20867d80e7e91fb7db531f34035d91591ba405",
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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": "c73be61cede5882f9605a852414db559c0ebedfd",
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"lessThan": "da52e5fcb2cae6acdc0d5722ff83499f8232b9d1",
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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": "c73be61cede5882f9605a852414db559c0ebedfd",
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"lessThan": "f94c45f83e688e41dfe1b3a589806a0a25567260",
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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": "c73be61cede5882f9605a852414db559c0ebedfd",
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"lessThan": "811fb6d0b07605e8e8d93bde8748be4b3028809a",
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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": "c73be61cede5882f9605a852414db559c0ebedfd",
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"lessThan": "9e73a6754457ffed8399b835552013b9363e51d1",
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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": "c73be61cede5882f9605a852414db559c0ebedfd",
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"lessThan": "5e531d62f1f8834faf7a4eed0d41105cf6570a8f",
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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/watch_queue.c"
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],
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"versions": [
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{
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"version": "5.8",
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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": "5.8",
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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": "5.8",
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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": "5.8",
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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": "5.8",
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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": "5.8",
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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": "5.8",
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"versionEndExcluding": "6.12.115"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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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": "5.8",
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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": "5.8",
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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/2137d487b25eefa862be70de489b64f4c679fe1f"
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},
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{
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"url": "https://git.kernel.org/stable/c/6aaa6c1a1b61aae332d6e7e0083140b86ea51e14"
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},
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{
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"url": "https://git.kernel.org/stable/c/4b20867d80e7e91fb7db531f34035d91591ba405"
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},
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{
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"url": "https://git.kernel.org/stable/c/da52e5fcb2cae6acdc0d5722ff83499f8232b9d1"
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},
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{
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"url": "https://git.kernel.org/stable/c/f94c45f83e688e41dfe1b3a589806a0a25567260"
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},
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{
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"url": "https://git.kernel.org/stable/c/811fb6d0b07605e8e8d93bde8748be4b3028809a"
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},
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{
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"url": "https://git.kernel.org/stable/c/9e73a6754457ffed8399b835552013b9363e51d1"
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},
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{
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"url": "https://git.kernel.org/stable/c/5e531d62f1f8834faf7a4eed0d41105cf6570a8f"
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}
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],
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"title": "watch_queue: Fix note pool publication race in watch_queue_set_size()",
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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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} |