{"id":"CVE-2026-99263","published":"2026-11-03T12:17:33.347","lastModified":"2026-11-03T20:18:31.887","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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/41fae2e9e1fa3bee86aee0a25ba90e59ce5024bf","tags":[]},{"url":"https://git.kernel.org/stable/c/4ef685b8505615729d75c875f52822238bf76ca6","tags":[]},{"url":"https://git.kernel.org/stable/c/521e8a65e9b45532295ba1082ef12be6e80c173b","tags":[]},{"url":"https://git.kernel.org/stable/c/937d38dcacd675dc0572d6c9b6743960df3128ed","tags":[]},{"url":"https://git.kernel.org/stable/c/afa407c02f3aa0fd872f86c9bf1b34502e0fa8f0","tags":[]},{"url":"https://git.kernel.org/stable/c/d1f6850086ac6f8b0fa44fb19aa2a468c73ee071","tags":[]},{"url":"https://git.kernel.org/stable/c/eb2a50d8235e4580fea9aa20f3fbe1a002c38cb1","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}