Vulnerability Description
PREVAIL is a Polynomial-Runtime EBPF Verifier using an Abstract Interpretation Layer. Prior to version 0.2.4, the prevail eBPF verifier accepts ALU32 ADD and SUB instructions that operate on pointer-typed registers without checking the is64 flag. Because ALU32 arithmetic zero-extends the 32-bit result, the upper half of any pointer is silently destroyed at runtime, yet prevail marks the program as verified safe. Any caller that can submit an eBPF program for verification — including unprivileged users on kernels that permit BPF program loading — can produce a program that passes verification but faults or misbehaves at runtime. This issue has been patched in version 0.2.4.
Related Weaknesses (CWE)
References
- https://github.com/vbpf/prevail/commit/d3fab8c23a93d9a615bc741b254ab26391559e0f
- https://github.com/vbpf/prevail/releases/tag/v0.2.4
- https://github.com/vbpf/prevail/security/advisories/GHSA-65fp-5qmq-gg2m
FAQ
What is CVE-2026-53706?
CVE-2026-53706 is a documented vulnerability. PREVAIL is a Polynomial-Runtime EBPF Verifier using an Abstract Interpretation Layer. Prior to version 0.2.4, the prevail eBPF verifier accepts ALU32 ADD and SUB instructions that operate on pointer-t...
How severe is CVE-2026-53706?
CVSS scoring is not yet available for CVE-2026-53706. Check NVD for updates.
Is there a patch for CVE-2026-53706?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.