{"id":"CVE-2026-43079","state":"PUBLISHED","title":"perf/x86/intel/uncore: Skip discovery table for offline dies","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/intel/uncore: Skip discovery table for offline dies\n\nThis warning can be triggered if NUMA is disabled and the system\nboots with fewer CPUs than the number of CPUs in die 0.\n\nWARNING: CPU: 9 PID: 7257 at uncore.c:1157 uncore_pci_pmu_register+0x136/0x160 [intel_uncore]\n\nCurrently, the discovery table continues to be parsed even if all CPUs\nin the associated die are offline.  This can lead to an array overflow\nat \"pmu->boxes[die] = box\" in uncore_pci_pmu_register(), which may\ntrigger the warning above or cause other issues.","publishedAt":"2026-05-06T07:40:15.767Z","updatedAt":"2026-06-01T16:14:21.072Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"d18da11a5e21eac7651c8897e5e0908f6c2bc9de","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"dfcba8c8674cead6c88a2f269b71aa4efd3d384a","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"cfab2c817d2e7e0bee98d66850246ce842ed5f18","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"6cfc187d85f18f976d0fe527d4c6f6171542cc19","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"f34feda8e0c9535fee3f8870ce8bab53c2798f71","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"7a2cb02437d92ed14fe494d8994056d5bd2c72b4","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"7b568e9eba2fad89a696f22f0413d44cf4a1f892","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/events/intel/uncore_discovery.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","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/uncore_discovery.c"]}],"references":["https://git.kernel.org/stable/c/d18da11a5e21eac7651c8897e5e0908f6c2bc9de","https://git.kernel.org/stable/c/dfcba8c8674cead6c88a2f269b71aa4efd3d384a","https://git.kernel.org/stable/c/cfab2c817d2e7e0bee98d66850246ce842ed5f18","https://git.kernel.org/stable/c/6cfc187d85f18f976d0fe527d4c6f6171542cc19","https://git.kernel.org/stable/c/f34feda8e0c9535fee3f8870ce8bab53c2798f71","https://git.kernel.org/stable/c/7a2cb02437d92ed14fe494d8994056d5bd2c72b4","https://git.kernel.org/stable/c/7b568e9eba2fad89a696f22f0413d44cf4a1f892"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43079.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43079","state":"PUBLISHED","datePublished":"2026-05-06T07:40:15.767Z","dateUpdated":"2026-06-01T16:14:21.072Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.983Z"},"containers":{"cna":{"title":"perf/x86/intel/uncore: Skip discovery table for offline dies","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/intel/uncore: Skip discovery table for offline dies\n\nThis warning can be triggered if NUMA is disabled and the system\nboots with fewer CPUs than the number of CPUs in die 0.\n\nWARNING: CPU: 9 PID: 7257 at uncore.c:1157 uncore_pci_pmu_register+0x136/0x160 [intel_uncore]\n\nCurrently, the discovery table continues to be parsed even if all CPUs\nin the associated die are offline.  This can lead to an array overflow\nat \"pmu->boxes[die] = box\" in uncore_pci_pmu_register(), which may\ntrigger the warning above or cause other issues."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"d18da11a5e21eac7651c8897e5e0908f6c2bc9de","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"dfcba8c8674cead6c88a2f269b71aa4efd3d384a","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"cfab2c817d2e7e0bee98d66850246ce842ed5f18","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"6cfc187d85f18f976d0fe527d4c6f6171542cc19","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"f34feda8e0c9535fee3f8870ce8bab53c2798f71","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"7a2cb02437d92ed14fe494d8994056d5bd2c72b4","versionType":"git"},{"version":"edae1f06c2cda41edffc93de6aedc8ba8dc883c3","status":"affected","lessThan":"7b568e9eba2fad89a696f22f0413d44cf4a1f892","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/events/intel/uncore_discovery.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","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/uncore_discovery.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d18da11a5e21eac7651c8897e5e0908f6c2bc9de"},{"url":"https://git.kernel.org/stable/c/dfcba8c8674cead6c88a2f269b71aa4efd3d384a"},{"url":"https://git.kernel.org/stable/c/cfab2c817d2e7e0bee98d66850246ce842ed5f18"},{"url":"https://git.kernel.org/stable/c/6cfc187d85f18f976d0fe527d4c6f6171542cc19"},{"url":"https://git.kernel.org/stable/c/f34feda8e0c9535fee3f8870ce8bab53c2798f71"},{"url":"https://git.kernel.org/stable/c/7a2cb02437d92ed14fe494d8994056d5bd2c72b4"},{"url":"https://git.kernel.org/stable/c/7b568e9eba2fad89a696f22f0413d44cf4a1f892"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-01T16:14:21.072Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}