220 lines
10 KiB
JSON
220 lines
10 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-2026-80920",
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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": "2026-08-26T14:34:25.801Z",
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"datePublished": "2026-09-09T16:13:17.023Z",
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"dateUpdated": "2026-10-21T12:47:14.401Z"
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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": "2026-10-21T12:47:14.401Z"
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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\nio_uring: defer eventfd signaling when queued from a wakeup handler\n\nio_req_local_work_add() signals the CQ ring eventfd inline when it is the\none to push the first entry onto ->work_list. For DEFER_TASKRUN rings that\nadd is frequently done from a waitqueue wakeup handler, where an\narbitrary waitqueue lock is held.\n\neventfd_signal_mask() only refuses to recurse when current->in_eventfd\nis set, but that bit is set by eventfd_signal_mask() itself. If the wake\nchain starts somewhere else, signal goes out inline and can feed back\ninto epoll.\n\nAdd IOU_F_TWQ_IN_WAKE, set it on the task_work add done from the three\nwaitqueue callbacks, and use it to force io_eventfd_signal() down the\nexisting call_rcu_hurry() deferral instead of signaling inline."
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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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"include/linux/io_uring_types.h",
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"io_uring/eventfd.c",
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"io_uring/eventfd.h",
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"io_uring/futex.c",
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"io_uring/io_uring.c",
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"io_uring/poll.c",
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"io_uring/tw.c",
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"io_uring/waitid.c"
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],
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"versions": [
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{
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"version": "21a091b970cdbcf3e8ff829234b51be6f9192766",
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"lessThan": "d0c240f25e654442a72af5ca021a02165ccce638",
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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": "21a091b970cdbcf3e8ff829234b51be6f9192766",
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"lessThan": "9d984451baf768ecd9e1fdad4637b729fcb2c9d5",
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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": "21a091b970cdbcf3e8ff829234b51be6f9192766",
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"lessThan": "e22f4494cc9487d326e5e3067f33dea7c1e442b2",
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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": "21a091b970cdbcf3e8ff829234b51be6f9192766",
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"lessThan": "b6bb334b0e9348887e3e55e1f494b0c3b8fbf59f",
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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": "21a091b970cdbcf3e8ff829234b51be6f9192766",
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"lessThan": "40b6ccf68731809ceb85c6e9f0f8f2ed61c7aa5a",
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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": "21a091b970cdbcf3e8ff829234b51be6f9192766",
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"lessThan": "cd305ee3633a45fcf5f3a5d83f99f3cb77d87b6e",
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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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"include/linux/io_uring_types.h",
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"io_uring/eventfd.c",
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"io_uring/eventfd.h",
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"io_uring/futex.c",
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"io_uring/io_uring.c",
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"io_uring/poll.c",
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"io_uring/tw.c",
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"io_uring/waitid.c"
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],
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"versions": [
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{
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"version": "6.1",
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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": "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": "6.6.160",
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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": "6.18.49",
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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": "7.1.11",
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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": "7.2.1",
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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": "6.1",
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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": "6.1",
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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": "6.1",
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"versionEndExcluding": "6.18.49"
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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": "6.1",
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"versionEndExcluding": "7.1.11"
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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": "6.1",
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"versionEndExcluding": "7.2.1"
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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": "6.1",
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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/d0c240f25e654442a72af5ca021a02165ccce638"
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},
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{
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"url": "https://git.kernel.org/stable/c/9d984451baf768ecd9e1fdad4637b729fcb2c9d5"
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},
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{
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"url": "https://git.kernel.org/stable/c/e22f4494cc9487d326e5e3067f33dea7c1e442b2"
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},
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{
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"url": "https://git.kernel.org/stable/c/b6bb334b0e9348887e3e55e1f494b0c3b8fbf59f"
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},
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{
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"url": "https://git.kernel.org/stable/c/40b6ccf68731809ceb85c6e9f0f8f2ed61c7aa5a"
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},
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{
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"url": "https://git.kernel.org/stable/c/cd305ee3633a45fcf5f3a5d83f99f3cb77d87b6e"
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}
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],
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"title": "io_uring: defer eventfd signaling when queued from a wakeup handler",
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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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} |