CVE-2025-40359perf/x86/intel: Fix KASAN global-out-of-bounds warning
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel: Fix KASAN global-out-of-bounds warning When running "perf mem record" command on CWF, the below KASAN global-out-of-bounds warning is seen. ================================================================== BUG: KASAN: global-out-of-bounds in cmt_latency_data+0x176/0x1b0 Read of size 4 at addr ffffffffb721d000 by task dtlb/9850 Call Trace: kasan_report+0xb8/0xf0 cmt_latency_data+0x176/0x1b0 setup_arch_pebs_sample_data+0xf49/0x2560 intel_pmu_drain_arch_pebs+0x577/0xb00 handle_pmi_common+0x6c4/0xc80 The issue is caused by below code in __grt_latency_data(). The code tries to access x86_hybrid_pmu structure which doesn't exist on non-hybrid platform like CWF. WARN_ON_ONCE(hybrid_pmu(event->pmu)->pmu_type == hybrid_big) So add is_hybrid() check before calling this WARN_ON_ONCE to fix the global-out-of-bounds access issue.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- May 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 090262439f66df03d4e9d0e52e14104b729e2ef8 builds before 1b61a1da3d8105ea1be548c94c2856697eb7ffd1; 090262439f66df03d4e9d0e52e14104b729e2ef8 builds before 710a72e81a7028e1ad1a10eb14f941f8dd45ffd3; 090262439f66df03d4e9d0e52e14104b729e2ef8 builds before 0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251 | CNA record |
References
- https://git.kernel.org/stable/c/1b61a1da3d8105ea1be548c94c2856697eb7ffd1
- https://git.kernel.org/stable/c/710a72e81a7028e1ad1a10eb14f941f8dd45ffd3
- https://git.kernel.org/stable/c/0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.