Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-06-24T00:00:00 kernel: perf/amd/ibs: Avoid calling perf_allow_kernel() from the IBS NMI handler 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CWE-663

In the Linux kernel, the following vulnerability has been resolved: perf/amd/ibs: Avoid calling perf_allow_kernel() from the IBS NMI handler Calling perf_allow_kernel() from the NMI context is unsafe and could be fatal. Capture the permission at event-initialization time by storing it in event->hw.flags, and have the NMI handler rely on that cached flag instead of making the call directly.

A flaw was found in the Linux kernel's performance monitoring unit (perf/amd/ibs). An issue exists where calling `perf_allow_kernel()` from a Non-Maskable Interrupt (NMI) handler is unsafe. This could lead to a system crash, resulting in a Denial of Service (DoS) for the affected system.

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 Not affected kernel Red Hat Enterprise Linux 8 Not affected 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-2026-53114 https://nvd.nist.gov/vuln/detail/CVE-2026-53114 https://lore.kernel.org/linux-cve-announce/2026062415-CVE-2026-53114-dc8b@gregkh/T