ghsa-4mfx-236h-48h4
Vulnerability from github
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.
{
"affected": [],
"aliases": [
"CVE-2025-40359"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-16T14:15:47Z",
"severity": null
},
"details": "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.",
"id": "GHSA-4mfx-236h-48h4",
"modified": "2025-12-16T15:30:43Z",
"published": "2025-12-16T15:30:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40359"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1b61a1da3d8105ea1be548c94c2856697eb7ffd1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/710a72e81a7028e1ad1a10eb14f941f8dd45ffd3"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
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