CVE-2026-92520

Published: September 19, 2026Last modified: September 25, 2026

Description

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.

Status

References

• https://git.kernel.org/stable/c/1534c4bff3aaca19c4c9a82f93e9b81f7c983de3
• https://git.kernel.org/stable/c/7ac6e1ae41a09f1dd4baeeff1d028ae49ee01232
• https://git.kernel.org/stable/c/e2396b8a562073787e627a5f483f1bc5c452fa6a