# CVE-2026-88914: Gstreamer1-plugins-good: gstreamer: integer overflow and out-of-bounds read in qtdemux cea-608 closed-caption parser

> An integer overflow in GStreamer's CEA-608 parser allows attackers to read adjacent heap memory or crash the application via a malicious media file.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 11 Sep 2026
- **Updated:** 11 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-88914, ECHO-a9c1-c7b1-8672, GHSA-h8hr-49hh-qr69, UBUNTU-CVE-2026-88914

## What is CVE-2026-88914?

CVE-2026-88914 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 11 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A flaw was found in GStreamer's gst-plugins-good isomp4 plugin. When processing a specially crafted MP4 or MOV file containing CEA-608 closed-caption data, an integer overflow in 32-bit unsigned arithmetic can bypass a bounds check in the caption parser. This leads to an out-of-bounds heap read of up to 244 bytes, which is then included in the downstream caption output. An attacker could exploit this by tricking a user into opening a malicious media file, potentially resulting in disclosure of adjacent heap memory or application crash.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2026-88914?


## How do I fix CVE-2026-88914?

Apply the vendor's patch.

## Is CVE-2026-88914 being exploited?

There is no known exploitation of CVE-2026-88914 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-88914 and fix it if it is affected.

What it is: CVE-2026-88914 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 11 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-88914 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-2026-88914/ (Markdown: https://insights.sbomify.com/CVE-2026-88914/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-88914
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-88914
- OSV: https://osv.dev/vulnerability/CVE-2026-88914

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-88914/
Summaries are generated and may contain mistakes; the official description above is the record.