166 lines
7.8 KiB
JSON
166 lines
7.8 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-2026-98858",
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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": "2026-09-25T10:25:14.376Z",
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"datePublished": "2026-10-18T15:51:19.578Z",
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"dateUpdated": "2026-10-19T09:26:52.852Z"
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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": "2026-10-19T09:26:52.852Z"
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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: fix task_work add use-after-free with SQPOLL\n\nFor SQPOLL, the sqpoll thread runs task_work off its own list and\ndoesn't need to be told about it, so it can pop and complete a request\nas soon as mpscq_push() has published it. If that was the last request\nholding the ring alive, io_ring_exit_work() then frees the ctx, stops\nthe thread, and with it the tctx, while io_req_normal_work_add() is\nstill looking at both after the push:\n\n BUG: KASAN: slab-use-after-free in io_req_normal_work_add+0x439/0x510\n Read of size 4 at addr ff11000000ca0000 by task repro/55\n (...)\n BUG: KASAN: slab-use-after-free in queue_work_on+0x25/0x70\n Write of size 8 at addr ff11000000c3bd00 by task repro/55\n\nHold an RCU read lock across the add, like io_req_local_work_add() already\ndoes, and have io_ring_exit_work() wait for a grace period for SQPOLL rings\nas well before freeing the ctx."
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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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"io_uring/io_uring.c",
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"io_uring/tw.c"
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],
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"versions": [
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{
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"version": "af5d68f8892f8ee8f137648b79ceb2abc153a19b",
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"lessThan": "42b3332efacfd2140be4cd0dedad4fb96b8ae90e",
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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": "af5d68f8892f8ee8f137648b79ceb2abc153a19b",
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"lessThan": "891bd8335a0de3bb15c3b797ce3026bbb0dbef6c",
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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": "af5d68f8892f8ee8f137648b79ceb2abc153a19b",
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"lessThan": "395b25968fe854d4efaa19a8e9b7a5b6d1b3eea3",
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"status": "affected",
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},
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{
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"lessThan": "a92193c91e8839fe5fc209616ea95465ae4b919d",
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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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"io_uring/io_uring.c",
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"io_uring/tw.c"
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],
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"versions": [
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{
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"version": "6.9",
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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": "6.9",
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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": "6.12.113",
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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": "6.18.56",
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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": "7.2.10",
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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": "6.9",
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"versionEndExcluding": "6.12.113"
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},
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{
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"vulnerable": true,
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"versionStartIncluding": "6.9",
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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": "6.9",
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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/42b3332efacfd2140be4cd0dedad4fb96b8ae90e"
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},
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{
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"url": "https://git.kernel.org/stable/c/891bd8335a0de3bb15c3b797ce3026bbb0dbef6c"
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},
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{
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"url": "https://git.kernel.org/stable/c/395b25968fe854d4efaa19a8e9b7a5b6d1b3eea3"
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},
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{
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"url": "https://git.kernel.org/stable/c/a92193c91e8839fe5fc209616ea95465ae4b919d"
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}
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],
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"title": "io_uring: fix task_work add use-after-free with SQPOLL",
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