Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: perf: Fix __perf_event_overflow() vs perf_remove_from_context() race Make sure that __perf_event_overflow() runs with IRQs disabled for all possible callchains. Specifically the software events can end up running it with only preemption disabled. This opens up a race vs perf_event_exit_event() and friends that will go and free various things the overflow path expects to be present, like the BPF program.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/3f89b61dd504c5b6711de9759e053b082f9abf12
- https://git.kernel.org/stable/c/4df1a45819e50993cb351682a6ae8e7ed2d233a0
- https://git.kernel.org/stable/c/4f8d5812337871227bb2c98669a87c306a2f86ef
- https://git.kernel.org/stable/c/5c48fdc4b4623533d86e279f51531a7ba212eb87
- https://git.kernel.org/stable/c/bb190628fe5f2a73ba762a9972ba16c5e895f73e
- https://git.kernel.org/stable/c/c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae
FAQ
What is CVE-2026-23271?
CVE-2026-23271 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: perf: Fix __perf_event_overflow() vs perf_remove_from_context() race Make sure that __perf_event_overflow() runs with IRQs disable...
How severe is CVE-2026-23271?
CVE-2026-23271 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23271?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.