# CVE-2026-88357: Denial of service in n/a

> Crafted network input causes unaligned memory access in nDPI, leading to process termination and denial of service.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Sep 2026
- **Updated:** 24 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-88357, GHSA-hjcq-5876-2cpr, UBUNTU-CVE-2026-88357

## What is CVE-2026-88357?

CVE-2026-88357 is a high-severity denial of service vulnerability in n/a, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

nDPI 5.1.0 contains a memory access issue in the DNS dissector and serializer deserialization code. Specially crafted network input can cause byte-buffer addresses at odd offsets to be cast to uint16_t or wider integer pointers and directly dereferenced without alignment checks. This results in undefined behavior and can cause process termination in UBSan-instrumented builds or on strict-alignment architectures, leading to denial of service.

Weakness: CWE-1335 (Incorrect Bitwise Shift of Integer)

## Which versions are affected by CVE-2026-88357?


## How do I fix CVE-2026-88357?

No fix has been published for CVE-2026-88357 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-88357 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-88357 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-88357 and fix it if it is affected.

What it is: CVE-2026-88357 is a high-severity denial of service vulnerability in n/a, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-88357 exists.

Affected product: n/a. 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-2026-88357/ (Markdown: https://insights.sbomify.com/CVE-2026-88357/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-88357
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-88357
- OSV: https://osv.dev/vulnerability/CVE-2026-88357

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-88357/
Summaries are generated and may contain mistakes; the official description above is the record.