{"id":"CVE-2026-81010","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/waitid: honor task_work cancellation\n\nio_waitid_cb() may run through the fallback task_work path when\ntask_work_add() can no longer queue work to the originati…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/waitid: honor task_work cancellation\n\nio_waitid_cb() may run through the fallback task_work path when\ntask_work_add() can no longer queue work to the originati…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= f31ecf671ddc498f20219453395794ff2383e06b < 0879697520abda2383ed7be40572ad583b5c4b02","Linux >= f31ecf671ddc498f20219453395794ff2383e06b < 7bc98e2de8c58a2bfaf0f540eb096a386ecfc96c","Linux >= f31ecf671ddc498f20219453395794ff2383e06b < 14572de82e5022899e5856008bc9cac97004a88c","Linux 6.7"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T13:18:55.347","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81010","references":[{"url":"https://git.kernel.org/stable/c/0879697520abda2383ed7be40572ad583b5c4b02","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/14572de82e5022899e5856008bc9cac97004a88c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7bc98e2de8c58a2bfaf0f540eb096a386ecfc96c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81010.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-81010"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532087"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-81010"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81010"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81010.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"ingestedAt":"2026-09-14T15:12:31.225Z","epss":0.00134,"epssPercentile":0.03274,"cwe":["CWE-663"],"scores":{"nvd":7.8,"vendor":5.5,"cna":7.8},"slug":"CVE-2026-81010","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/waitid: honor task_work cancellation\n\nio_waitid_cb() may run through the fallback task_work path when\ntask_work_add() can no longer queue work to the originating task. The\nfallback runs from a kworker and io_uring marks such task work as\ncanceled through tw.cancel.\n\nio_waitid_cb() currently ignores tw.cancel and calls __do_wait().\nwaitid is task-context dependent: __do_wait() performs child lookup\nrelative to current, and the retry path also uses\ncurrent->signal->wait_chldexit. If the callback runs from the fallback\nkworker, current is therefore not the task that submitted the request.\n\nHonor tw.cancel before entering __do_wait(). Complete the request with\n-ECANCELED and skip the siginfo copy, since canceled task work may run\nwithout the submitting task's userspace execution context.\n\nKeep the existing siginfo handling for normal waitid completion and\nexplicit cancellation.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81010.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":183566,"id":"CVE-2026-81010","ts":1789356675912,"field":"cvss","old":"7.8","new":"4.7"},{"seq":183565,"id":"CVE-2026-81010","ts":1789356675912,"field":"severity","old":"high","new":"medium"},{"seq":153206,"id":"CVE-2026-81010","ts":1789285349545,"field":"cvss","old":null,"new":"7.8"},{"seq":153205,"id":"CVE-2026-81010","ts":1789285349545,"field":"severity","old":"none","new":"high"},{"seq":147732,"id":"CVE-2026-81010","ts":1789270212076,"field":"cvss","old":null,"new":"4.7"},{"seq":147731,"id":"CVE-2026-81010","ts":1789270212076,"field":"severity","old":"none","new":"medium"},{"seq":109490,"id":"CVE-2026-81010","ts":1789183732115,"field":"cvss","old":null,"new":"4.7"},{"seq":109489,"id":"CVE-2026-81010","ts":1789183732115,"field":"severity","old":"none","new":"medium"}]}