CVE-2026-31782 Details
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.
A vulnerability in the Linux kernel's handling of Intel Performance Monitoring Unit (PMU) events can lead to out-of-bounds memory reads. This issue arises in versions of the kernel that include the problematic PMU event handling, specifically within the 'perf' subsystem for x86 architecture. The vulnerability is related to the 'intel_pmu_hw_config' function, where a 'container_of' operation could incorrectly process events, particularly when software events are mixed with hardware events. The issue is exacerbated by the fact that the software event PMU is not the x86_hybrid_pmu', which could allow for improper event handling and memory access.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed. The specific commit that resolves this issue is 'bfee04838f636d064bc92075c65c95f739003804', which is available in the Linux kernel stable tree.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/bfee04838f636d064bc92075c65c95f739003804 | kernel.org | Patch |
| https://git.kernel.org/stable/c/dbde07f06226438cd2cf1179745fa1bec5d8914a | kernel.org | Patch |
| https://git.kernel.org/stable/c/e435a30ca6fe14c9611b1fc731c98a6d28410247 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.16.1, < 6.18.22 >= 6.19, < 6.19.12 6.16 - 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 7.0 rc5 7.0 rc6 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 11, 2026 | Initial Analysis | [email protected] |
| May 3, 2026 | CVE Modified | kernel.org |
| May 1, 2026 | New CVE Received | kernel.org |