{"id":"CVE-2026-43079","title":"perf/x86/intel/uncore: Skip discovery table for offline dies","summary":"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 …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < d18da11a5e21eac7651c8897e5e0908f6c2bc9de","Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < dfcba8c8674cead6c88a2f269b71aa4efd3d384a","Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < cfab2c817d2e7e0bee98d66850246ce842ed5f18","Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < 6cfc187d85f18f976d0fe527d4c6f6171542cc19","Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < f34feda8e0c9535fee3f8870ce8bab53c2798f71","Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < 7a2cb02437d92ed14fe494d8994056d5bd2c72b4","Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < 7b568e9eba2fad89a696f22f0413d44cf4a1f892","Linux 5.13"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:28:04.991226Z"},"published":"2026-05-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:32:30.372Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43079","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"}],"tags":["cve.org"],"epss":0.00123,"epssPercentile":0.02028,"ingestedAt":"2026-11-06T15:54:04.025Z","slug":"CVE-2026-43079","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < d18da11a5e21eac7651c8897e5e0908f6c2bc9de`\n- `Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < dfcba8c8674cead6c88a2f269b71aa4efd3d384a`\n- `Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < cfab2c817d2e7e0bee98d66850246ce842ed5f18`\n- `Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < 6cfc187d85f18f976d0fe527d4c6f6171542cc19`\n- `Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < f34feda8e0c9535fee3f8870ce8bab53c2798f71`\n- `Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < 7a2cb02437d92ed14fe494d8994056d5bd2c72b4`\n- `Linux >= edae1f06c2cda41edffc93de6aedc8ba8dc883c3 < 7b568e9eba2fad89a696f22f0413d44cf4a1f892`\n- `Linux 5.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}