# CVE-2026-86476: Memory corruption in Red Hat Enterprise Linux 10

> A heap buffer overflow in GStreamer plugins allows local attackers to cause denial of service or execute code via crafted video metadata.

- **Severity:** High 8.4 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Oct 2026
- **Updated:** 14 Oct 2026
- **Also known as:** AZL-108306, BELL-CVE-2026-86476, DEBIAN-CVE-2026-86476, ECHO-e132-6f91-51bb, GHSA-8f88-phh5-g894, UBUNTU-CVE-2026-86476

## What is CVE-2026-86476?

CVE-2026-86476 is a high-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A flaw was found in gst-plugins-base. A heap buffer overflow can be triggered when processing video buffers whose attached GstVideoMeta metadata declares plane strides and offsets that exceed the actual backing memory allocation. The metadata is not range-checked during deserialization, and the video frame mapping code does not verify that the declared plane geometry fits within the buffer before allowing consumers to read or write video data. A local attacker who controls the sending side of a GStreamer inter-process IPC pipeline can deliver a crafted buffer carrying fabricated strides, causing the receiving process to read or write beyond heap boundaries. Successful exploitation can cause a denial of service or potentially allow code execution within the affected process.

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

## Which versions are affected by CVE-2026-86476?


## How do I fix CVE-2026-86476?

No fix has been published for CVE-2026-86476 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-86476 being exploited?

There is no known exploitation of CVE-2026-86476 in the wild and no public exploit code.

Public exploit code:

- https://github.com/0xSemizzz/CVE-2026-86476 (github_poc): https://github.com/0xSemizzz/CVE-2026-86476

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-86476 and fix it if it is affected.

What it is: CVE-2026-86476 is a high-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-86476 in the wild and no public exploit code.

Affected product: Red Hat Enterprise Linux 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-2026-86476/ (Markdown: https://insights.sbomify.com/CVE-2026-86476/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-86476
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-86476
- OSV: https://osv.dev/vulnerability/CVE-2026-86476

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-86476/
Summaries are generated and may contain mistakes; the official description above is the record.