🚨 CVE-2026-53670
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.
🎖@cveNotify
GitHub
Havoc offsets on non-singleton-typeset pointer add/sub · vbpf/prevail@2b209bc
When the destination register of an `add`/`sub` carries a non-singleton
typeset (two or more simultaneously possible pointer types, e.g. at a join
where the same register may be a context or shared...
September 2, 2026 15
