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CVE-2026-31782

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: perf/x86: Fix potential bad container_of in intel_pmu_hw_config Auto counter reload may have a group of events with software ev…

Published May 1, 2026CWE-125EPSS 0.17%

Overview

CVE-2026-31782 is a high-severity vulnerability. It was published on May 1, 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/x86: Fix potential bad container_of in intel_pmu_hw_config

Auto counter reload may have a group of events with software events

present within it. The software event PMU isn't the x86_hybrid_pmu and

a container_of operation in intel_pmu_set_acr_caused_constr (via the

hybrid helper) could cause out of bound memory reads. Avoid this by

guarding the call to intel_pmu_set_acr_caused_constr with an

is_x86_event check.

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/bfee04838f636d064bc92075c65c95f739003804Refgit.kernel.org/stable/c/dbde07f06226438cd2cf1179745fa1bec5d8914aRefgit.kernel.org/stable/c/e435a30ca6fe14c9611b1fc731c98a6d28410247

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31782?

CVE-2026-31782 is a high-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-31782?

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-2026-31782?

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-2026-31782?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31782 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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