CVE-2026-92520
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.
Affected versions
Linux kernel versions
5.4.258,
5.10.198,
5.15.134,
6.1.56,
6.5.6,
6.6
and later are affected. Fixed in
6.18.52,
7.2.6,
7.3-rc1
and their respective stable series.
References
3 totalFrequently asked questions
-
What is CVE-2026-92520?
CVE-2026-92520 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.4.258 onward and has been patched in 6.18.52, 7.2.6 and 7.3-rc1. CVE-2026-92520 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-92520?
Yes. CVE-2026-92520 has been patched. Fixed versions include 6.18.52, 7.2.6 and 7.3-rc1. If you are running Linux kernel 5.4.258 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-92520 actively exploited?
No. CVE-2026-92520 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.