CVE-2025-40359 (GCVE-0-2025-40359)
Vulnerability from cvelistv5 – Published: 2025-12-16 13:39 – Updated: 2026-05-11 21:47
VLAI
EPSS
VEX
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
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
090262439f66df03d4e9d0e52e14104b729e2ef8 , < 1b61a1da3d8105ea1be548c94c2856697eb7ffd1
(git)
Affected: 090262439f66df03d4e9d0e52e14104b729e2ef8 , < 710a72e81a7028e1ad1a10eb14f941f8dd45ffd3 (git) Affected: 090262439f66df03d4e9d0e52e14104b729e2ef8 , < 0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251 (git) |
guessed | |
| 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) |
guessed |
{
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"product": "Linux",
"programFiles": [
"arch/x86/events/intel/ds.c"
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"vendor": "Linux",
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"versionType": "semver"
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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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"nodes": [
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}
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"negate": false,
"operator": "OR"
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"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."
}
],
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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",
"x_generator": {
"engine": "bippy-1.2.0"
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}
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"assignerShortName": "Linux",
"cveId": "CVE-2025-40359",
"datePublished": "2025-12-16T13:39:58.778Z",
"dateReserved": "2025-04-16T07:20:57.187Z",
"dateUpdated": "2026-05-11T21:47:50.767Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-40359",
"date": "2026-10-17",
"epss": "0.00199",
"percentile": "0.0903"
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"nvd": {
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"product": "Linux",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"lessThan": "1b61a1da3d8105ea1be548c94c2856697eb7ffd1",
"status": "affected",
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"versionType": "git"
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{
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"status": "affected",
"version": "090262439f66df03d4e9d0e52e14104b729e2ef8",
"versionType": "git"
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{
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"programFiles": [
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"versions": [
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]
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],
"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."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nperf/x86/intel: Solucionar la advertencia KASAN de acceso fuera de l\u00edmites global\n\nAl ejecutar el comando \u0027perf mem record\u0027 en CWF, se observa la siguiente advertencia KASAN de acceso fuera de l\u00edmites global.\n\n ==================================================================\n BUG: KASAN: acceso fuera de l\u00edmites global en cmt_latency_data+0x176/0x1b0\n Lectura de tama\u00f1o 4 en la direcci\u00f3n ffffffffb721d000 por la tarea dtlb/9850\n\n Traza de llamadas:\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\nEl problema es causado por el siguiente c\u00f3digo en __grt_latency_data(). El c\u00f3digo intenta acceder a la estructura x86_hybrid_pmu que no existe en plataformas no h\u00edbridas como CWF.\n\n WARN_ON_ONCE(hybrid_pmu(event -\u003e pmu) -\u003e pmu_type == hybrid_big)\n\nPor lo tanto, se a\u00f1ade una comprobaci\u00f3n is_hybrid() antes de llamar a este WARN_ON_ONCE para solucionar el problema de acceso fuera de l\u00edmites global."
}
],
"id": "CVE-2025-40359",
"lastModified": "2026-10-14T13:10:00.187",
"metrics": {},
"published": "2025-12-16T14:15:47.863",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"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"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-30T02:59:44+00:00",
"cve": "CVE-2025-40359",
"id": "CVE-2025-40359",
"initial_release_date": "2025-12-16T00:00:00+00:00",
"product_status:known_affected": "184",
"product_status:known_not_affected": "90",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: perf/x86/intel: Fix KASAN global-out-of-bounds warning",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40359.json",
"version": "3"
}
}
}
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