Linux
CVE-2026-99262: In the Linux kernel, the following vulnerability has been resolved: io_uring/timeout: don't lose a cancel as io-wq arms a timeout An IORING_OP_TIMEOUT run by
CVE-2026-99262 Nov 3, 2026 Source: Vendor
In the Linux kernel, the following vulnerability has been resolved:
io_uring/timeout: don't lose a cancel as io-wq arms a timeout
An IORING_OP_TIMEOUT run by io-wq, because of IOSQE_ASYNC, has the same
problem as poll, futex and waitid. io_wq_submit_work() looks at
IO_WQ_WORK_CANCEL once, before it issues the request. A cancel in between
flags the work, gets -EALREADY, and searches ->timeout_list in vain,
while the worker then adds the request and starts the timer:
io-wq worker
Source of record
The credited names below are quoted verbatim from the vendor's own advisory:
https://nvd.nist.gov/vuln/detail/CVE-2026-99262
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