# DSA-5870-1: openh264 security update

DSA-5870-1, released February 26, 2025, fixes 1 CVE in openh264 (version 2.3.1+dfsg-3+deb12u1). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/dsa-5870-1
- Platform: Linux
- Released: Feb 26, 2025
- Priority: High (Closes CVE-2025-27091, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2025-27091

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [openh264](https://patchblox.com/security/data/product/linux/openh264.md) | Debian 12.15 (bookworm) | 2.3.1+dfsg-3+deb12u1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-27091](https://patchblox.com/security/data/cve/CVE-2025-27091.md) | High | libopenh264-8: OpenH264 is a free license codec library which supports H.264 encoding anddecoding | 7.5 | 0.0069 |  |

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Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo