Bug 2492402 (CVE-2026-53114) - CVE-2026-53114 kernel: perf/amd/ibs: Avoid calling perf_allow_kernel() from the IBS NMI handler
Summary: CVE-2026-53114 kernel: perf/amd/ibs: Avoid calling perf_allow_kernel() from t...
Keywords:
Status: NEW
Alias: CVE-2026-53114
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: 2026-06-24 18:10 UTC by OSIDB Bzimport
Modified: 2026-06-26 13:00 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-06-24 18:10:20 UTC 
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.
Comment 1 Mauro Matteo Cascella 2026-06-26 12:54:42 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062415-CVE-2026-53114-dc8b@gregkh/T
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