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Vulnerability record · CVE-2026-31782 · published 1 May 2026

CVE-2026-31782: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.17% · top 94.0% CWE-125 · Out-of-bounds read
7.8CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/bfee04838f636d064bc92075c65c95f739003804 Patch
https://git.kernel.org/stable/c/dbde07f06226438cd2cf1179745fa1bec5d8914a Patch
https://git.kernel.org/stable/c/e435a30ca6fe14c9611b1fc731c98a6d28410247 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-31782), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.