# CVE-2026-53670

## Summary

- **CVE ID:** CVE-2026-53670
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-682
- **Published:** Sep 2, 2026
- **Last Modified:** Sep 2, 2026

## 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.

## Affected Products

- vbpf — prevail (< 0.2.4)

## References

- [CNA](https://github.com/vbpf/prevail/security/advisories/GHSA-2qc8-qh94-66rc)
- [CNA](https://github.com/vbpf/prevail/commit/2b209bc4e3d612ff9aca87125e67c0ff84477e61)
- [CNA](https://github.com/vbpf/prevail/releases/tag/v0.2.4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.29%
- **EPSS Percentile:** 21.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._