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.
Affected products
linux: linux kernel
References10
- git.kernel.org/stable/c/3f89b61dd504c5b6711de9759e053b082f9abf12 Patch
- git.kernel.org/stable/c/4df1a45819e50993cb351682a6ae8e7ed2d233a0 Patch
- git.kernel.org/stable/c/4f8d5812337871227bb2c98669a87c306a2f86ef Patch
- git.kernel.org/stable/c/5c48fdc4b4623533d86e279f51531a7ba212eb87 Patch
- git.kernel.org/stable/c/bb190628fe5f2a73ba762a9972ba16c5e895f73e Patch
- git.kernel.org/stable/c/c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae Patch
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.com/productcert/html/ssa-082556.html
- cert-portal.siemens.com/productcert/html/ssa-457936.html
- cert-portal.siemens.com/productcert/html/ssa-784472.html
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 1 · as of 12 November 2026
- CWE
- CWE-362
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.