Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log It's trivial for user to trigger "verifier log line truncated" warning, as verifier has a fixed-sized buffer of 1024 bytes (as of now), and there are at least two pieces of user-provided information that can be output through this buffer, and both can be arbitrarily sized by user: - BTF names; - BTF.ext source code lines strings. Verifier log buffer should be properly sized for typical verifier state output. But it's sort-of expected that this buffer won't be long enough in some circumstances. So let's drop the check. In any case code will work correctly, at worst truncating a part of a single line output.
References
- https://git.kernel.org/stable/c/40c88c429a598006f91ad7a2b89856cd50b3a008
- https://git.kernel.org/stable/c/926a175026fed5d534f587ea4ec3ec49265cd3c5
- https://git.kernel.org/stable/c/cff36398bd4c7d322d424433db437f3c3391c491
FAQ
What is CVE-2023-54145?
CVE-2023-54145 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: bpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log It's trivial for user to trigger "verifier log line truncated" w...
How severe is CVE-2023-54145?
CVSS scoring is not yet available for CVE-2023-54145. Check NVD for updates.
Is there a patch for CVE-2023-54145?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.