Quick answers
- Is CVE-2026-53706 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-53706 being exploited in the wild.
- How severe is CVE-2026-53706?
- Informational severity, with a CVSS score of 0, published 2 September 2026.
- Which products and versions are affected?
- vBPF Prevail prior to 0.2.4.
- Is there a fix for CVE-2026-53706?
- A patch was published on 2026-06-01: Version 0.2.4 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-53706 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-53706?
- Check whether you run vBPF Prevail at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a validation bypass in the PREVAIL eBPF verifier affecting ALU32 (32-bit arithmetic) ADD and SUB instructions on pointer-typed registers. The root cause is that the verifier does not check the is64 flag and fails to account for the fact that 32-bit arithmetic zero-extends results into 64-bit registers, corrupting pointer values by destroying their upper half. An unprivileged user who can load eBPF programs can craft a program that passes verification but faults or misbehaves at runtime, such as dereferencing a corrupted address. The fix, released in version 0.2.4, ensures the verifier "forgets" (discards) truncated ALU32 pointer arithmetic results, preventing their later use as pointers or leaked as scalar values.
Affected products
- vbpf PREVAIL prior to 0.2.4
Timeline
- 2026-09-02: disclosed
- 2026-06-01: patched: Version 0.2.4 released