CVE-2025-40359 (GCVE-0-2025-40359)
Vulnerability from cvelistv5
Published
2025-12-16 13:39
Modified
2025-12-16 13:39
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
Impacted products
{
"containers": {
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"programFiles": [
"arch/x86/events/intel/ds.c"
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"version": "6.17.8",
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{
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"version": "6.18",
"versionType": "original_commit_for_fix"
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"cpeApplicability": [
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"descriptions": [
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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."
}
],
"providerMetadata": {
"dateUpdated": "2025-12-16T13:39:58.778Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
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"url": "https://git.kernel.org/stable/c/1b61a1da3d8105ea1be548c94c2856697eb7ffd1"
},
{
"url": "https://git.kernel.org/stable/c/710a72e81a7028e1ad1a10eb14f941f8dd45ffd3"
},
{
"url": "https://git.kernel.org/stable/c/0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251"
}
],
"title": "perf/x86/intel: Fix KASAN global-out-of-bounds warning",
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"cveMetadata": {
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"cveId": "CVE-2025-40359",
"datePublished": "2025-12-16T13:39:58.778Z",
"dateReserved": "2025-04-16T07:20:57.187Z",
"dateUpdated": "2025-12-16T13:39:58.778Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-40359\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-16T14:15:47.863\",\"lastModified\":\"2025-12-18T15:08:25.907\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1b61a1da3d8105ea1be548c94c2856697eb7ffd1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/710a72e81a7028e1ad1a10eb14f941f8dd45ffd3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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