CVE-2026-43079

perf/x86/intel/uncore: Skip discovery table for offline dies

State: Published
Severity: Not scored
Published: May 6, 2026
Updated: Jun 1, 2026
Reserved: May 1, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

perf/x86/intel/uncore: Skip discovery table for offline dies

This warning can be triggered if NUMA is disabled and the system boots with fewer CPUs than the number of CPUs in die 0.

WARNING: CPU: 9 PID: 7257 at uncore.c:1157 uncore_pci_pmu_register+0x136/0x160 [intel_uncore]

Currently, the discovery table continues to be parsed even if all CPUs in the associated die are offline. This can lead to an array overflow at "pmu->boxes[die] = box" in uncore_pci_pmu_register(), which may trigger the warning above or cause other issues.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before d18da11a5e21eac7651c8897e5e0908f6c2bc9deAffected edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before dfcba8c8674cead6c88a2f269b71aa4efd3d384aAffected edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before cfab2c817d2e7e0bee98d66850246ce842ed5f18Affected edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before 6cfc187d85f18f976d0fe527d4c6f6171542cc19Affected edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before f34feda8e0c9535fee3f8870ce8bab53c2798f71Affected edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before 7a2cb02437d92ed14fe494d8994056d5bd2c72b4Affected edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before 7b568e9eba2fad89a696f22f0413d44cf4a1f892Affected
LinuxLinux	5.13Affected before 5.13Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.136 through 6.6.Not affected 6.12.83 through 6.12.Not affected 6.18.24 through 6.18.Not affected 6.19.14 through 6.19.Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before d18da11a5e21eac7651c8897e5e0908f6c2bc9deAffected
edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before dfcba8c8674cead6c88a2f269b71aa4efd3d384aAffected
edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before cfab2c817d2e7e0bee98d66850246ce842ed5f18Affected
edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before 6cfc187d85f18f976d0fe527d4c6f6171542cc19Affected
edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before f34feda8e0c9535fee3f8870ce8bab53c2798f71Affected
edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before 7a2cb02437d92ed14fe494d8994056d5bd2c72b4Affected
edae1f06c2cda41edffc93de6aedc8ba8dc883c3 to before 7b568e9eba2fad89a696f22f0413d44cf4a1f892Affected

LinuxLinux

5.13Affected
before 5.13Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.136 through 6.6.*Not affected
6.12.83 through 6.12.*Not affected
6.18.24 through 6.18.*Not affected
6.19.14 through 6.19.*Not affected
7.0 and laterNot affected

References

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