# CVE-2026-53706: Other in prevail

> The PREVAIL eBPF verifier incorrectly accepts unsafe pointer arithmetic, allowing attackers to load programs that cause kernel faults or potential code execution.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Sep 2026
- **Updated:** 3 Sep 2026
- **Also known as:** GHSA-65fp-5qmq-gg2m

## What is CVE-2026-53706?

CVE-2026-53706 is a high-severity vulnerability in vbpf prevail, published on 2 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

PREVAIL is a Polynomial-Runtime EBPF Verifier using an Abstract Interpretation Layer. Prior to version 0.2.4, the prevail eBPF verifier accepts ALU32 ADD and SUB instructions that operate on pointer-typed registers without checking the is64 flag. Because ALU32 arithmetic zero-extends the 32-bit result, the upper half of any pointer is silently destroyed at runtime, yet prevail marks the program as verified safe. Any caller that can submit an eBPF program for verification — including unprivileged users on kernels that permit BPF program loading — can produce a program that passes verification but faults or misbehaves at runtime. This issue has been patched in version 0.2.4.

Weakness: CWE-682 (Incorrect Calculation)

## Which versions are affected by CVE-2026-53706?


## How do I fix CVE-2026-53706?

No fix has been published for CVE-2026-53706 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-53706 being exploited?

There is no known exploitation of CVE-2026-53706 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53706 and fix it if it is affected.

What it is: CVE-2026-53706 is a high-severity vulnerability in vbpf prevail, published on 2 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-53706 in the wild and no public exploit code.

Affected product: vbpf prevail. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-53706/ (Markdown: https://insights.sbomify.com/CVE-2026-53706/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53706
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53706
- OSV: https://osv.dev/vulnerability/CVE-2026-53706

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-53706/
Summaries are generated and may contain mistakes; the official description above is the record.