CyberRota Analysis
AI-GeneratedThe PREVAIL eBPF verifier prior to version 0.2.4 is vulnerable due to improper handling of ALU32 ADD and SUB instructions on pointer-typed registers, leading to potential runtime faults as the upper half of pointers is incorrectly zero-extended. This flaw allows unprivileged users to submit malicious eBPF programs that appear verified but can cause significant misbehavior when executed. Organizations utilizing PREVAIL should prioritize upgrading to version 0.2.4 to mitigate the risk of exploitation.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD 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.