CVE-2026-23271

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.

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