PT-2026-37389 · Linux · Linux

Published 2026-05-06 · Updated 2026-05-06 · CVE-2026-43079

NVD

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.

Related Identifiers

CVE-2026-43079

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-43079 · Security Note
• https://git.kernel.org/stable/c/7a2cb02437d92ed14fe494d8994056d5bd2c72b4 · Note
• https://git.kernel.org/stable/c/7b568e9eba2fad89a696f22f0413d44cf4a1f892 · Note
• https://git.kernel.org/stable/c/cfab2c817d2e7e0bee98d66850246ce842ed5f18 · Note
• https://git.kernel.org/stable/c/6cfc187d85f18f976d0fe527d4c6f6171542cc19 · Note
• https://git.kernel.org/stable/c/f34feda8e0c9535fee3f8870ce8bab53c2798f71 · Note