{"id":"CVE-2025-40359","state":"PUBLISHED","title":"perf/x86/intel: Fix KASAN global-out-of-bounds warning","description":"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't exist on\nnon-hybrid platform like CWF.\n\n        WARN_ON_ONCE(hybrid_pmu(event->pmu)->pmu_type == hybrid_big)\n\nSo add is_hybrid() check before calling this WARN_ON_ONCE to fix the\nglobal-out-of-bounds access issue.","publishedAt":"2025-12-16T13:39:58.778Z","updatedAt":"2026-05-11T21:47:50.767Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"090262439f66df03d4e9d0e52e14104b729e2ef8","status":"affected","lessThan":"1b61a1da3d8105ea1be548c94c2856697eb7ffd1","versionType":"git"},{"version":"090262439f66df03d4e9d0e52e14104b729e2ef8","status":"affected","lessThan":"710a72e81a7028e1ad1a10eb14f941f8dd45ffd3","versionType":"git"},{"version":"090262439f66df03d4e9d0e52e14104b729e2ef8","status":"affected","lessThan":"0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/events/intel/ds.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.12.58","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.8","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/events/intel/ds.c"]}],"references":["https://git.kernel.org/stable/c/1b61a1da3d8105ea1be548c94c2856697eb7ffd1","https://git.kernel.org/stable/c/710a72e81a7028e1ad1a10eb14f941f8dd45ffd3","https://git.kernel.org/stable/c/0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40359.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40359","state":"PUBLISHED","datePublished":"2025-12-16T13:39:58.778Z","dateUpdated":"2026-05-11T21:47:50.767Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.187Z"},"containers":{"cna":{"title":"perf/x86/intel: Fix KASAN global-out-of-bounds warning","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't exist on\nnon-hybrid platform like CWF.\n\n        WARN_ON_ONCE(hybrid_pmu(event->pmu)->pmu_type == hybrid_big)\n\nSo add is_hybrid() check before calling this WARN_ON_ONCE to fix the\nglobal-out-of-bounds access issue."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"090262439f66df03d4e9d0e52e14104b729e2ef8","status":"affected","lessThan":"1b61a1da3d8105ea1be548c94c2856697eb7ffd1","versionType":"git"},{"version":"090262439f66df03d4e9d0e52e14104b729e2ef8","status":"affected","lessThan":"710a72e81a7028e1ad1a10eb14f941f8dd45ffd3","versionType":"git"},{"version":"090262439f66df03d4e9d0e52e14104b729e2ef8","status":"affected","lessThan":"0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/events/intel/ds.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.12.58","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.8","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/events/intel/ds.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1b61a1da3d8105ea1be548c94c2856697eb7ffd1"},{"url":"https://git.kernel.org/stable/c/710a72e81a7028e1ad1a10eb14f941f8dd45ffd3"},{"url":"https://git.kernel.org/stable/c/0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:47:50.767Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.12.58"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.17.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}