# CVE-2026-100236: Dpdk: dpdk: heap out-of-bounds read/write in gso header copy

> A remote attacker can trigger heap out-of-bounds read/write in DPDK GSO via crafted packets, potentially causing code execution or denial of service.

- **Severity:** High 8.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Oct 2026
- **Updated:** 20 Oct 2026
- **Also known as:** AZL-108339, DEBIAN-CVE-2026-100236, GHSA-62fj-4whq-8247, UBUNTU-CVE-2026-100236

## What is CVE-2026-100236?

CVE-2026-100236 is a high-severity memory corruption vulnerability in Red Hat Fast Datapath for RHEL 10, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw was found in the DPDK GSO library. When software GSO copies packet headers into a new mbuf, it does not check that the header fits in the source first segment or in the destination buffer, and a header longer than the configured GSO segment size can underflow the payload-size calculation. A remote or guest-supplied packet processed with software GSO can trigger an out-of-bounds read or write.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2026-100236?


## How do I fix CVE-2026-100236?

Apply the vendor's patch.

## Is CVE-2026-100236 being exploited?

There is no known exploitation of CVE-2026-100236 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-100236 and fix it if it is affected.

What it is: CVE-2026-100236 is a high-severity memory corruption vulnerability in Red Hat Fast Datapath for RHEL 10, published on 14 Oct 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-2026-100236 in the wild and no public exploit code.

Affected product: Red Hat Fast Datapath for RHEL 10. 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-2026-100236/ (Markdown: https://insights.sbomify.com/CVE-2026-100236/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-100236
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-100236
- OSV: https://osv.dev/vulnerability/CVE-2026-100236

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-100236/
Summaries are generated and may contain mistakes; the official description above is the record.