CVE-2026-53670 — PREVAIL: Non-singleton typeset in add() skips offset update, allowing OOB access to pass eBPF verification
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…
Published: 2026-09-02 · CVSS: 9.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7