{"identifier":"CVE-2026-99263","cve":{"id":"CVE-2026-99263","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/poll: avoid retry wakeup loss when dropping ownership\n\nIf a wakeup sets IO_POLL_RETRY_FLAG between the owning task consuming\nthe existing instance of IO_POLL_RETRY_FLAG and the loop check\nof io_poll_check_events(), then we stall on processing the request\nuntil an unrelated wakeup comes along.\n\nUsing atomic_cmpxchg instead of atomic_sub_return to guarantee both the\ncount v and poll_refs are 0 and no wake-ups are missed.","published":"2026-11-03T12:17:33.347000+00:00","modified":"2026-11-03T20:18:31.887000+00:00","status":"Received","score":null,"severity":"UNSCORED","vector":"","cvss_version":"","affected":[],"weaknesses":[],"references":[{"url":"https://git.kernel.org/stable/c/41fae2e9e1fa3bee86aee0a25ba90e59ce5024bf","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4ef685b8505615729d75c875f52822238bf76ca6","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/521e8a65e9b45532295ba1082ef12be6e80c173b","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/937d38dcacd675dc0572d6c9b6743960df3128ed","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/afa407c02f3aa0fd872f86c9bf1b34502e0fa8f0","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d1f6850086ac6f8b0fa44fb19aa2a468c73ee071","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eb2a50d8235e4580fea9aa20f3fbe1a002c38cb1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"kev":null,"kev_checked":true,"metrics":{},"configurations":[],"source":"nvd","retrieved_at":"2026-11-03T23:31:58.838191+00:00","exploited":false,"kev_stale":false,"products":[],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence.","Fresh EPSS data is unavailable; missing values are not zero."]},"epss":null,"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"git.kernel.org","source_url":"https://git.kernel.org/stable/c/41fae2e9e1fa3bee86aee0a25ba90e59ce5024bf","investigate_url":"https://investigate.aeglixmind.com/#git.kernel.org"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-99263","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-99263","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-99263","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}