Linux
CVE-2026-99268: In the Linux kernel, the following vulnerability has been resolved: io_uring: wake ring pollers for local task_work With IORING_SETUP_DEFER_TASKRUN completion
CVE-2026-99268 Nov 3, 2026 Source: Vendor
In the Linux kernel, the following vulnerability has been resolved:
io_uring: wake ring pollers for local task_work
With IORING_SETUP_DEFER_TASKRUN completions are queued as local work, and
only become CQEs when the submitter enters the kernel to wait for events.
For an application that finds out via poll() or epoll on the ring fd when
it is time to do that, io_uring_poll() reports EPOLLIN if local work is
pending.
That only helps if the work is there at the time of the call. When
DEFER_TASKR
Source of record
The credited names below are quoted verbatim from the vendor's own advisory:
https://nvd.nist.gov/vuln/detail/CVE-2026-99268
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