Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: io_uring/napi: cap busy_poll_to 10 msec Currently there's no cap on the maximum amount of time that napi is allowed to poll if no events are found, which can lead to kernel complaints on a task being stuck as there's no conditional rescheduling done within that loop. Just cap it to 10 msec in total, that's already way above any kind of sane value that will reap any benefits, yet low enough that it's nowhere near being able to trigger preemption complaints.
References
- https://git.kernel.org/stable/c/39767f944a8c9e696566c37ad5b20131406c4b8d
- https://git.kernel.org/stable/c/cb3af525f8dfb8930f0c123e5755fa967a12d5c1
- https://git.kernel.org/stable/c/df8599ee18c0e5fe343ffe0b4c379636b8bb839a
FAQ
What is CVE-2026-53321?
CVE-2026-53321 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: io_uring/napi: cap busy_poll_to 10 msec Currently there's no cap on the maximum amount of time that napi is allowed to poll if no ...
How severe is CVE-2026-53321?
CVSS scoring is not yet available for CVE-2026-53321. Check NVD for updates.
Is there a patch for CVE-2026-53321?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.