Deadlock The advisory has been revoked - it doesn't affect any version of package perf  (opens in a new tab)

The Centos security team deemed this advisory irrelevant for Centos:10.

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by Centos.

In the Linux kernel, the following vulnerability has been resolved:

bpf: Do not allow deleting local storage in NMI

Currently, local storage may deadlock when deferring freeing selem or local storage through kfree_rcu(), call_rcu() or call_rcu_tasks_trace() in NMI or reentrant. Since deleting selem in NMI is an unlikely use case, partially mitigate it by returning error when calling from bpf_xxx_storage_delete() helpers in NMI. Note that, it is still possible to deadlock through reentrant. A full mitigation requires returning error when irqs_disabled() is true, which, however is too heavy-handed for bpf_xxx_storage_delete().

The long-term solution requires _nolock versions of call_rcu. Another possible solution is to defer the free through irq_work [0], but it would grow the size of selem, which is non-ideal.

The check is only needed in bpf_selem_unlink(), which is used by helpers and syscalls. bpf_selem_unlink_nofail() is fine as it is called during map and owner tear down that never run in NMI or reentrant.

[0] https://lore.kernel.org/bpf/20260205190233.912-1-alexei.starovoitov@gmail.com/

• https://bugzilla.redhat.com/show_bug.cgi?id=2492411
• https://access.redhat.com/security/cve/CVE-2026-53106
• https://git.kernel.org/stable/c/350de5b8a9befaa2a68861c51f671d4f5f751ca5
• https://git.kernel.org/stable/c/e84acaf936970b5b0be2c93bbf255295ba9406df