DocumentationOverview
About vulnerability
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.
Details
- Affected product:
- Debian 11 ELS
- Affected packages:
- linux @ 5.10.259