CVE-2026-31782
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | ec980e4facef8110f6fce27e5b6344660117f01f < e435a30ca6fe14c9611b1fc731c98a6d28410247 | affected |
| Linux | Linux | ec980e4facef8110f6fce27e5b6344660117f01f < bfee04838f636d064bc92075c65c95f739003804 | affected |
| Linux | Linux | ec980e4facef8110f6fce27e5b6344660117f01f < dbde07f06226438cd2cf1179745fa1bec5d8914a | affected |
| Linux | Linux | 6.16 | affected |
| Linux | Linux | 0 < 6.16 | unaffected |
| Linux | Linux | 6.18.22 <= 6.18.* | unaffected |
| Linux | Linux | 6.19.12 <= 6.19.* | unaffected |
| Linux | Linux | 7.0 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/e435a30ca6fe14c9611b1fc731c98a6d28410247
- https://git.kernel.org/stable/c/bfee04838f636d064bc92075c65c95f739003804
- https://git.kernel.org/stable/c/dbde07f06226438cd2cf1179745fa1bec5d8914a
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