# CVE-2026-55869: srt vulnerability

CVE-2026-55869 is fixed in 7 products on 1 platform, first by libsrt1 1.4.0-1ubuntu0.1~esm1, released July 21, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-55869
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: n/a
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 21, 2026

## Description

[Heap-Based Buffer Overflow in KMREQ Handling]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libsrt1 Ubuntu 20.04 LTS (focal) | 1.4.0-1ubuntu0.1~esm1 | [libsrt1 1.4.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libsrt1-1.4.0-1ubuntu0.1-esm1.md) | Jul 21, 2026 |
| Linux | libsrt1.4-gnutls Ubuntu 22.04.1 LTS (jammy) | 1.4.4-4ubuntu0.1~esm1 | [libsrt1.4-gnutls 1.4.4-4ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsrt1.4-gnutls-1.4.4-4ubuntu0.1-esm1.md) | Jul 21, 2026 |
| Linux | libsrt1.4-openssl Ubuntu 22.04.1 LTS (jammy) | 1.4.4-4ubuntu0.1~esm1 | [libsrt1.4-openssl 1.4.4-4ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsrt1.4-openssl-1.4.4-4ubuntu0.1-esm1.md) | Jul 21, 2026 |
| Linux | libsrt1.5-gnutls Ubuntu 24.04.5 LTS (noble) | 1.5.3-1ubuntu0.1~esm1 | [libsrt1.5-gnutls 1.5.3-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsrt1.5-gnutls-1.5.3-1ubuntu0.1-esm1.md) | Jul 21, 2026 |
| Linux | libsrt1.5-gnutls Ubuntu 26.04.1 LTS (resolute) | 1.5.4-3ubuntu0.1~esm1 | [libsrt1.5-gnutls 1.5.4-3ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsrt1.5-gnutls-1.5.4-3ubuntu0.1-esm1.md) | Jul 21, 2026 |
| Linux | libsrt1.5-openssl Ubuntu 24.04.5 LTS (noble) | 1.5.3-1ubuntu0.1~esm1 | [libsrt1.5-openssl 1.5.3-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsrt1.5-openssl-1.5.3-1ubuntu0.1-esm1.md) | Jul 21, 2026 |
| Linux | libsrt1.5-openssl Ubuntu 26.04.1 LTS (resolute) | 1.5.4-3ubuntu0.1~esm1 | [libsrt1.5-openssl 1.5.4-3ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsrt1.5-openssl-1.5.4-3ubuntu0.1-esm1.md) | Jul 21, 2026 |
| Linux | srt Debian 13.5 (trixie) | 1.5.4-1+deb13u1 | [DEBIAN-CVE-2026-55869](https://patchblox.com/security/data/fix/linux/debian-cve-2026-55869.md) | Jul 23, 2026 |
| Linux | srt Debian 14 | 1.5.6-1 | [DEBIAN-CVE-2026-55869](https://patchblox.com/security/data/fix/linux/debian-cve-2026-55869.md) | Jul 23, 2026 |
| Linux | srt-tools Ubuntu 20.04 LTS (focal) | 1.4.0-1ubuntu0.1~esm1 | [srt-tools 1.4.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-srt-tools-1.4.0-1ubuntu0.1-esm1.md) | Jul 21, 2026 |
| Linux | srt-tools Ubuntu 22.04.1 LTS (jammy) | 1.4.4-4ubuntu0.1~esm1 | [srt-tools 1.4.4-4ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-srt-tools-1.4.4-4ubuntu0.1-esm1.md) | Jul 21, 2026 |
| Linux | srt-tools Ubuntu 24.04.5 LTS (noble) | 1.5.3-1ubuntu0.1~esm1 | [srt-tools 1.5.3-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-srt-tools-1.5.3-1ubuntu0.1-esm1.md) | Jul 21, 2026 |
| Linux | srt-tools Ubuntu 26.04.1 LTS (resolute) | 1.5.4-3ubuntu0.1~esm1 | [srt-tools 1.5.4-3ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-srt-tools-1.5.4-3ubuntu0.1-esm1.md) | Jul 21, 2026 |

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Data as of 2026-11-08T00:53:09Z 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

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