Copyright © 2012 Red Hat, Inc. All rights reserved.
Low
2026-05-08T00:00:00
kernel: perf/x86/intel/uncore: Fix die ID init and look up bugs
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-253
A flaw was found in the Linux kernel's performance monitoring unit (perf/x86/intel/uncore) subsystem. This vulnerability arises from incorrect die ID initialization and lookup, particularly when certain CPUs are offline or when Non-Uniform Memory Access (NUMA) is disabled. As a consequence, performance monitoring units (PMON) may be ignored, potentially leading to a lack of critical performance data and affecting system observability.
Red Hat Enterprise Linux 10
Fix deferred
kernel
Red Hat Enterprise Linux 6
Not affected
kernel
Red Hat Enterprise Linux 7
Not affected
kernel
Red Hat Enterprise Linux 7
Not affected
kernel-rt
Red Hat Enterprise Linux 8
Fix deferred
kernel
Red Hat Enterprise Linux 8
Fix deferred
kernel-rt
Red Hat Enterprise Linux 9
Fix deferred
kernel
Red Hat Enterprise Linux 9
Fix deferred
kernel-rt
https://www.cve.org/CVERecord?id=CVE-2026-43344
https://nvd.nist.gov/vuln/detail/CVE-2026-43344
https://lore.kernel.org/linux-cve-announce/2026050836-CVE-2026-43344-8a41@gregkh/T