# CVE-2026-52718: Gstreamer1-plugins-bad-free: gstreamer: denial of service via av1 tile_list_obu parser byte/bit confusion

> A remote attacker can cause a denial of service by tricking a user into opening a crafted AV1 file, triggering a crash in the GStreamer parser.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 15 Jun 2026
- **Updated:** 30 Jul 2026
- **Also known as:** CLSA-2026-1784131003, DEBIAN-CVE-2026-52718, ECHO-daae-39e9-f2c0, GHSA-4cjw-rphc-c5v6, SUSE-SU-2026:23274-1, SUSE-SU-2026:23308-1, SUSE-SU-2026:3527-1, UBUNTU-CVE-2026-52718, openSUSE-SU-2026:21629-1

## What is CVE-2026-52718?

CVE-2026-52718 is a medium-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 15 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A denial of service vulnerability was found in GStreamer's AV1 codec parser in gst-plugins-bad. The gst_av1_parser_parse_tile_list_obu() function passes a byte count to a bit-reader API that expects a bit count, causing parser desynchronization. A remote attacker could trick a user into opening a specially crafted AV1 media file, triggering an assertion abort and causing the application to crash.

Weakness: CWE-617 (Reachable Assertion)

## Which versions are affected by CVE-2026-52718?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `gstreamer-plugins-bad` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 1.24.0-150600.4.12.1 |
| `gstreamer-plugins-bad` | SUSE:Linux Enterprise Module for Desktop Applications 15 SP7 | All versions | 1.24.0-150600.4.12.1 |
| `gstreamer-plugins-bad` | SUSE:Linux Enterprise Module for Package Hub 15 SP7 | All versions | 1.24.0-150600.4.12.1 |
| `gstreamer-plugins-bad` | SUSE:Linux Enterprise Server 16.0 | All versions | 1.26.7-160000.4.1 |
| `gstreamer-plugins-bad` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 1.26.7-160000.4.1 |
| `gstreamer-plugins-bad` | SUSE:Linux Micro 6.2 | All versions | 1.26.7-160000.4.1 |
| `gstreamer-plugins-bad` | openSUSE:Leap 16.0 | All versions | 1.26.7-160000.4.1 |

## How do I fix CVE-2026-52718?

Apply the vendor's patch.

## Is CVE-2026-52718 being exploited?

There is no known exploitation of CVE-2026-52718 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-52718 and fix it if it is affected.

What it is: CVE-2026-52718 is a medium-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 15 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-52718 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-2026-52718/ (Markdown: https://insights.sbomify.com/CVE-2026-52718/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-52718
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-52718
- OSV: https://osv.dev/vulnerability/CVE-2026-52718

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-52718/
Summaries are generated and may contain mistakes; the official description above is the record.