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CVE-2026-23271

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 disa…

Published Mar 20, 2026CWE-362EPSS 0.10%

Overview

CVE-2026-23271 is a high-severity vulnerability. It was published on March 20, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/3f89b61dd504c5b6711de9759e053b082f9abf12Refgit.kernel.org/stable/c/4df1a45819e50993cb351682a6ae8e7ed2d233a0Refgit.kernel.org/stable/c/4f8d5812337871227bb2c98669a87c306a2f86efRefgit.kernel.org/stable/c/5c48fdc4b4623533d86e279f51531a7ba212eb87Refgit.kernel.org/stable/c/bb190628fe5f2a73ba762a9972ba16c5e895f73eRefgit.kernel.org/stable/c/c9bc1753b3cc41d0e01fbca7f035258b5f4db0aeRefcert-portal.siemens.com/productcert/html/ssa-019113.htmlRefcert-portal.siemens.com/productcert/html/ssa-082556.html

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23271?

CVE-2026-23271 is a high-severity vulnerability. It was published on March 20, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-23271?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-23271?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-23271?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23271 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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