CVE-2026-53670: CWE-682: Incorrect Calculation in vbpf prevail
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.
CVSS v4.0
Score 9.3critical
Affected software
vbpf
prevail
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Prevail eBPF verifier before version 0.2.4 contains a flaw in the EbpfTransformer::add() method where offset-variable updates are silently skipped if the destination register has a non-singleton typeset (multiple pointer types). This results in subsequent bounds checks relying on outdated offset values, permitting out-of-bounds memory accesses to pass verification. Consequently, malicious BPF programs can corrupt memory at runtime. This vulnerability is tracked as CVE-2026-53670 and has a CVSS 4.0 score of 9.3, indicating critical severity. The issue is fixed in version 0.2.4.
Potential Impact
An attacker can craft a BPF program that bypasses the verifier's bounds checks due to stale offset information, leading to out-of-bounds memory accesses and potential memory corruption at runtime. This could compromise system stability or security by allowing unauthorized memory manipulation.
Mitigation Recommendations
This vulnerability has been patched in Prevail version 0.2.4. Users should upgrade to version 0.2.4 or later to remediate this issue. No other mitigation guidance is provided or necessary as the fix addresses the root cause.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-09T20:50:36.877Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a986636acd9273b498ff4d7
Added to database: 09/02/2026, 18:08:54 UTC
Last enriched: 09/07/2026, 13:32:39 UTC
Last updated: 10/17/2026, 06:48:18 UTC
Views: 87
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.