{"api_version":"1","generated_at":"2026-11-06T18:31:11+00:00","cve":"CVE-2026-99230","urls":{"html":"https://cve.report/CVE-2026-99230","api":"https://cve.report/api/cve/CVE-2026-99230.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-99230","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-99230"},"summary":{"title":"io_uring/cmd: don't leave list poison in ->hash_node","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/cmd: don't leave list poison in ->hash_node\n\nio_uring_cmd_del_cancelable() uses hlist_del() to take a command off\n->cancelable_uring_cmd, which leaves LIST_POISON1/2 behind in\n->hash_node. Requests are recycled through the request cache without\nbeing reinitialised, and not every user of ->hash_node sets it up before\nit is used:\n\nIf a vectored futex wait is woken while futex_wait_multiple_setup() is\nstill queueing the futexes, io_futexv_wait() doesn't add the request to\n->futex_list, and leaves the completion to the task_work queued by the\nwake up. io_futexv_complete() ends in __io_futex_complete(), whose\nhlist_del_init() is fine for a request that is unhashed, which is how all\nother users of the node leave it. If the request was a cancelable\nuring_cmd in its previous life, e.g. a ublk FETCH_REQ, it writes through\nLIST_POISON2:\n\n  Oops: general protection fault, probably for non-canonical address\n  KASAN: maybe wild-memory-access in range [0xdead000000000120-...]\n  RIP: 0010:io_futexv_complete+0x219/0x420\n  Call Trace:\n   tctx_task_work_run+0x804/0x950\n   tctx_task_work+0x71/0xa0\n   task_work_run+0x118/0x200\n\nLeave the node unhashed.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-11-02 16:17:47","updated_at":"2026-11-06 18:18:33"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/4c83e39f4d1944d7146fd06094f2c8053238d55c","name":"https://git.kernel.org/stable/c/4c83e39f4d1944d7146fd06094f2c8053238d55c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c4fe1024b2f3f40f8010591a0c0ad541e2883eda","name":"https://git.kernel.org/stable/c/c4fe1024b2f3f40f8010591a0c0ad541e2883eda","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2d5af21422060c088f6e4fb0f1e7dcf5bcdd6707","name":"https://git.kernel.org/stable/c/2d5af21422060c088f6e4fb0f1e7dcf5bcdd6707","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cc7f13d006fcefed9564bd79f135b51d344e9c77","name":"https://git.kernel.org/stable/c/cc7f13d006fcefed9564bd79f135b51d344e9c77","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/685b49483200384d7f49d338af476e26e6824637","name":"https://git.kernel.org/stable/c/685b49483200384d7f49d338af476e26e6824637","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-99230","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99230","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 93b8cc60c37b9d17732b7a297e5dca29b50a990d cc7f13d006fcefed9564bd79f135b51d344e9c77 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 93b8cc60c37b9d17732b7a297e5dca29b50a990d 2d5af21422060c088f6e4fb0f1e7dcf5bcdd6707 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 93b8cc60c37b9d17732b7a297e5dca29b50a990d 685b49483200384d7f49d338af476e26e6824637 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 93b8cc60c37b9d17732b7a297e5dca29b50a990d c4fe1024b2f3f40f8010591a0c0ad541e2883eda git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 93b8cc60c37b9d17732b7a297e5dca29b50a990d 4c83e39f4d1944d7146fd06094f2c8053238d55c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.115 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.60 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.14 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3.2 7.3.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.4-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"99230","cve":"CVE-2026-99230","epss":"0.001550000","percentile":"0.046460000","score_date":"2026-11-03","updated_at":"2026-11-04 00:14:34"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["io_uring/uring_cmd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"cc7f13d006fcefed9564bd79f135b51d344e9c77","status":"affected","version":"93b8cc60c37b9d17732b7a297e5dca29b50a990d","versionType":"git"},{"lessThan":"2d5af21422060c088f6e4fb0f1e7dcf5bcdd6707","status":"affected","version":"93b8cc60c37b9d17732b7a297e5dca29b50a990d","versionType":"git"},{"lessThan":"685b49483200384d7f49d338af476e26e6824637","status":"affected","version":"93b8cc60c37b9d17732b7a297e5dca29b50a990d","versionType":"git"},{"lessThan":"c4fe1024b2f3f40f8010591a0c0ad541e2883eda","status":"affected","version":"93b8cc60c37b9d17732b7a297e5dca29b50a990d","versionType":"git"},{"lessThan":"4c83e39f4d1944d7146fd06094f2c8053238d55c","status":"affected","version":"93b8cc60c37b9d17732b7a297e5dca29b50a990d","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["io_uring/uring_cmd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.7"},{"lessThan":"6.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.115","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.60","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.14","versionType":"semver"},{"lessThanOrEqual":"7.3.*","status":"unaffected","version":"7.3.2","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.4-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.115","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.60","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.14","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3.2","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.4-rc1","versionStartIncluding":"6.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/cmd: don't leave list poison in ->hash_node\n\nio_uring_cmd_del_cancelable() uses hlist_del() to take a command off\n->cancelable_uring_cmd, which leaves LIST_POISON1/2 behind in\n->hash_node. Requests are recycled through the request cache without\nbeing reinitialised, and not every user of ->hash_node sets it up before\nit is used:\n\nIf a vectored futex wait is woken while futex_wait_multiple_setup() is\nstill queueing the futexes, io_futexv_wait() doesn't add the request to\n->futex_list, and leaves the completion to the task_work queued by the\nwake up. io_futexv_complete() ends in __io_futex_complete(), whose\nhlist_del_init() is fine for a request that is unhashed, which is how all\nother users of the node leave it. If the request was a cancelable\nuring_cmd in its previous life, e.g. a ublk FETCH_REQ, it writes through\nLIST_POISON2:\n\n  Oops: general protection fault, probably for non-canonical address\n  KASAN: maybe wild-memory-access in range [0xdead000000000120-...]\n  RIP: 0010:io_futexv_complete+0x219/0x420\n  Call Trace:\n   tctx_task_work_run+0x804/0x950\n   tctx_task_work+0x71/0xa0\n   task_work_run+0x118/0x200\n\nLeave the node unhashed."}],"providerMetadata":{"dateUpdated":"2026-11-06T17:15:11.543Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/cc7f13d006fcefed9564bd79f135b51d344e9c77"},{"url":"https://git.kernel.org/stable/c/2d5af21422060c088f6e4fb0f1e7dcf5bcdd6707"},{"url":"https://git.kernel.org/stable/c/685b49483200384d7f49d338af476e26e6824637"},{"url":"https://git.kernel.org/stable/c/c4fe1024b2f3f40f8010591a0c0ad541e2883eda"},{"url":"https://git.kernel.org/stable/c/4c83e39f4d1944d7146fd06094f2c8053238d55c"}],"title":"io_uring/cmd: don't leave list poison in ->hash_node","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-99230","datePublished":"2026-11-02T16:06:37.984Z","dateReserved":"2026-09-25T10:25:14.402Z","dateUpdated":"2026-11-06T17:15:11.543Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-11-02 16:17:47","lastModifiedDate":"2026-11-06 18:18:33","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"99230","Ordinal":"1","Title":"io_uring/cmd: don't leave list poison in ->hash_node","CVE":"CVE-2026-99230","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"99230","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/cmd: don't leave list poison in ->hash_node\n\nio_uring_cmd_del_cancelable() uses hlist_del() to take a command off\n->cancelable_uring_cmd, which leaves LIST_POISON1/2 behind in\n->hash_node. Requests are recycled through the request cache without\nbeing reinitialised, and not every user of ->hash_node sets it up before\nit is used:\n\nIf a vectored futex wait is woken while futex_wait_multiple_setup() is\nstill queueing the futexes, io_futexv_wait() doesn't add the request to\n->futex_list, and leaves the completion to the task_work queued by the\nwake up. io_futexv_complete() ends in __io_futex_complete(), whose\nhlist_del_init() is fine for a request that is unhashed, which is how all\nother users of the node leave it. If the request was a cancelable\nuring_cmd in its previous life, e.g. a ublk FETCH_REQ, it writes through\nLIST_POISON2:\n\n  Oops: general protection fault, probably for non-canonical address\n  KASAN: maybe wild-memory-access in range [0xdead000000000120-...]\n  RIP: 0010:io_futexv_complete+0x219/0x420\n  Call Trace:\n   tctx_task_work_run+0x804/0x950\n   tctx_task_work+0x71/0xa0\n   task_work_run+0x118/0x200\n\nLeave the node unhashed.","Type":"Description","Title":"io_uring/cmd: don't leave list poison in ->hash_node"}]}}}