Bug 2466986 (CVE-2026-43079) - CVE-2026-43079 kernel: perf/x86/intel/uncore: Skip discovery table for offline dies
Summary: CVE-2026-43079 kernel: perf/x86/intel/uncore: Skip discovery table for offlin...
Keywords:
Status: NEW
Alias: CVE-2026-43079
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-06 10:01 UTC by OSIDB Bzimport
Modified: 2026-05-06 15:11 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-05-06 10:01:55 UTC
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.


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