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CVE-2025-40359 (GCVE-0-2025-40359)

Vulnerability from cvelistv5 – Published: 2025-12-16 13:39 – Updated: 2026-05-11 21:47
VLAI
Title
perf/x86/intel: Fix KASAN global-out-of-bounds warning
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 090262439f66df03d4e9d0e52e14104b729e2ef8 , < 1b61a1da3d8105ea1be548c94c2856697eb7ffd1 (git)
Affected: 090262439f66df03d4e9d0e52e14104b729e2ef8 , < 710a72e81a7028e1ad1a10eb14f941f8dd45ffd3 (git)
Affected: 090262439f66df03d4e9d0e52e14104b729e2ef8 , < 0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251 (git)
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Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/intel: Fix KASAN global-out-of-bounds warning\n\nWhen running \"perf mem record\" command on CWF, the below KASAN\nglobal-out-of-bounds warning is seen.\n\n  ==================================================================\n  BUG: KASAN: global-out-of-bounds in cmt_latency_data+0x176/0x1b0\n  Read of size 4 at addr ffffffffb721d000 by task dtlb/9850\n\n  Call Trace:\n\n   kasan_report+0xb8/0xf0\n   cmt_latency_data+0x176/0x1b0\n   setup_arch_pebs_sample_data+0xf49/0x2560\n   intel_pmu_drain_arch_pebs+0x577/0xb00\n   handle_pmi_common+0x6c4/0xc80\n\nThe issue is caused by below code in __grt_latency_data(). The code\ntries to access x86_hybrid_pmu structure which doesn\u0027t exist on\nnon-hybrid platform like CWF.\n\n        WARN_ON_ONCE(hybrid_pmu(event-\u003epmu)-\u003epmu_type == hybrid_big)\n\nSo add is_hybrid() check before calling this WARN_ON_ONCE to fix the\nglobal-out-of-bounds access issue."
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    "datePublished": "2025-12-16T13:39:58.778Z",
    "dateReserved": "2025-04-16T07:20:57.187Z",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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