eBPF Verifier Vulnerability in PREVAIL Affected by Pointer-typed Register Operations
CVE-2026-53706

8.8HIGH

Key Information:

Vendor

Vbpf

Status
Prevail
Vendor
CVE Published:
2 September 2026

What is CVE-2026-53706?

The PREVAIL eBPF Verifier, prior to version 0.2.4, had an improper verification flaw that allowed ALU32 ADD and SUB operations to be conducted on pointer-typed registers without adequate checks on the is64 flag. This oversight resulted in the upper half of pointers being unintentionally zeroed out, thus marking unsafe programs as verified. As a result, users with permission to submit eBPF programs could potentially exploit this vulnerability, leading to runtime errors or faulty behavior even though the program appeared safe during verification. The issue has since been resolved in version 0.2.4.

Affected Version(s)

prevail < 0.2.4

References

https://github.com/vbpf/prevail/security/advisories/GHSA-...
x_refsource_CONFIRM
https://github.com/vbpf/prevail/commit/d3fab8c23a93d9a615...
x_refsource_MISC
https://github.com/vbpf/prevail/releases/tag/v0.2.4
x_refsource_MISC

CVSS V4

Score:
8.8
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.