CyberRota Analysis
AI-GeneratedThe Prevail eBPF verifier prior to version 0.2.4 contains a critical vulnerability that allows crafted BPF programs to bypass verification, leading to potential out-of-bounds memory accesses and memory corruption at runtime. This issue arises from the verifier's failure to update offset variables correctly when dealing with non-singleton typesets. Organizations utilizing Prevail for eBPF verification 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, in the Prevail eBPF verifier, EbpfTransformer::add() silently skips offset-variable updates when the destination register carries a non-singleton typeset (two or more simultaneously possible pointer types). Subsequent bounds checks use the stale offset and accept out-of-bounds memory accesses, so a crafted BPF program passes verification even though it would corrupt memory at runtime. This issue has been patched in version 0.2.4.