Use of Uninitialized Resource The advisory has been revoked - it doesn't affect any version of package perf (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-PERF-21298995
- published21 Oct 2026
- disclosed17 Sept 2026
Introduced: 17 Sep 2026
CVE-2026-92520 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
bpf: Zero queue and stack outputs on lock failure
Queue and stack pop/peek helpers accept an uninitialized output buffer because the verifier expects the helper to initialize it. The empty-map error path clears the buffer, but a failed lock acquisition returns -EBUSY without writing it.
Clear the output before returning -EBUSY so BPF programs cannot observe uninitialized stack contents after a failed helper call.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2536422
- https://access.redhat.com/security/cve/CVE-2026-92520
- https://git.kernel.org/stable/c/1534c4bff3aaca19c4c9a82f93e9b81f7c983de3
- https://git.kernel.org/stable/c/7ac6e1ae41a09f1dd4baeeff1d028ae49ee01232
- https://git.kernel.org/stable/c/e2396b8a562073787e627a5f483f1bc5c452fa6a
- https://git.kernel.org/stable/c/23b4bcc79bab5285275912b94e98c286f281de75
- https://git.kernel.org/stable/c/a6090eeb289c5fa45f7b629befac2bd3c19a6dae
- https://git.kernel.org/stable/c/6468e8ac026b44ae2a78114b80f9d1b9164d0f6c