# CVE-2026-49295: libde265-0: libde265 is an open source implementation of the h.265 video codec

CVE-2026-49295 is fixed in 6 products on 1 platform, first by libde265-0 1.0.16-1ubuntu0.1~esm1, released June 30, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-49295
- Priority: High
- CVSS: 7.1 (Medium)
- EPSS: 0.0034
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 19, 2026

## Description

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted H.265 bitstream can cause an out-of-bounds array write in `decoder_context::process_reference_picture_set()` (`libde265/decctx.cc:1376`). The root cause is a missing aggregate bound check on predicted short-term reference picture set entries. Individual list sizes are validated, but the combined count after predicted RPS construction can exceed the 16-entry `PocStFoll` array, writing at index 16. Version 1.0.20 patches the issue.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libde265 Debian 12.15 (bookworm) | 1.0.11-1+deb12u3 | [DEBIAN-CVE-2026-49295](https://patchblox.com/security/data/fix/linux/debian-cve-2026-49295.md) | Jul 3, 2026 |
| Linux | libde265 Debian 13.5 (trixie) | 1.0.15-1+deb13u1 | [DEBIAN-CVE-2026-49295](https://patchblox.com/security/data/fix/linux/debian-cve-2026-49295.md) | Jul 3, 2026 |
| Linux | libde265 Debian 14 | 1.1.1-1 | [DEBIAN-CVE-2026-49295](https://patchblox.com/security/data/fix/linux/debian-cve-2026-49295.md) | Jul 3, 2026 |
| Linux | libde265 amzn 2023 | 1.0.18-1.amzn2023.0.2 | [ALAS2023-2026-1918](https://patchblox.com/security/data/fix/linux/alas2023-2026-1918.md) | Jul 6, 2026 |
| Linux | libde265-0 Ubuntu 18.04.6 LTS (bionic) | 1.0.2-2ubuntu0.18.04.1~esm6 | [libde265-0 1.0.2-2ubuntu0.18.04.1~esm6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libde265-0-1.0.2-2ubuntu0.18.04.1-esm6.md) | Jul 23, 2026 |
| Linux | libde265-0 Ubuntu 20.04 LTS (focal) | 1.0.4-1ubuntu0.4+esm2 | [libde265-0 1.0.4-1ubuntu0.4+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libde265-0-1.0.4-1ubuntu0.4-esm2.md) | Jul 23, 2026 |
| Linux | libde265-0 Ubuntu 22.04.1 LTS (jammy) | 1.0.8-1ubuntu0.3+esm2 | [libde265-0 1.0.8-1ubuntu0.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libde265-0-1.0.8-1ubuntu0.3-esm2.md) | Jul 23, 2026 |
| Linux | libde265-0 Ubuntu 24.04.5 LTS (noble) | 1.0.15-1ubuntu0.1 | [libde265-0 1.0.15-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libde265-0-1.0.15-1ubuntu0.1.md) | Jul 23, 2026 |
| Linux | libde265-0 Ubuntu 26.04.1 LTS (resolute) | 1.0.16-1ubuntu0.1~esm1 | [libde265-0 1.0.16-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libde265-0-1.0.16-1ubuntu0.1-esm1.md) | Jun 30, 2026 |
| Linux | libde265-debuginfo amzn 2023 | 1.0.18-1.amzn2023.0.2 | [ALAS2023-2026-1918](https://patchblox.com/security/data/fix/linux/alas2023-2026-1918.md) | Jul 6, 2026 |
| Linux | libde265-debugsource amzn 2023 | 1.0.18-1.amzn2023.0.2 | [ALAS2023-2026-1918](https://patchblox.com/security/data/fix/linux/alas2023-2026-1918.md) | Jul 6, 2026 |
| Linux | libde265-devel amzn 2023 | 1.0.18-1.amzn2023.0.2 | [ALAS2023-2026-1918](https://patchblox.com/security/data/fix/linux/alas2023-2026-1918.md) | Jul 6, 2026 |
| Linux | libde265-examples Ubuntu 18.04.6 LTS (bionic) | 1.0.2-2ubuntu0.18.04.1~esm6 | [libde265-examples 1.0.2-2ubuntu0.18.04.1~esm6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libde265-examples-1.0.2-2ubuntu0.18.04.1-esm6.md) | Jul 23, 2026 |
| Linux | libde265-examples Ubuntu 20.04 LTS (focal) | 1.0.4-1ubuntu0.4+esm2 | [libde265-examples 1.0.4-1ubuntu0.4+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libde265-examples-1.0.4-1ubuntu0.4-esm2.md) | Jul 23, 2026 |
| Linux | libde265-examples Ubuntu 22.04.1 LTS (jammy) | 1.0.8-1ubuntu0.3+esm2 | [libde265-examples 1.0.8-1ubuntu0.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libde265-examples-1.0.8-1ubuntu0.3-esm2.md) | Jul 23, 2026 |
| Linux | libde265-examples Ubuntu 24.04.5 LTS (noble) | 1.0.15-1ubuntu0.1 | [libde265-examples 1.0.15-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libde265-examples-1.0.15-1ubuntu0.1.md) | Jul 23, 2026 |
| Linux | libde265-examples Ubuntu 26.04.1 LTS (resolute) | 1.0.16-1ubuntu0.1~esm1 | [libde265-examples 1.0.16-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libde265-examples-1.0.16-1ubuntu0.1-esm1.md) | Jun 30, 2026 |

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Data as of 2026-11-08T13:06:02Z 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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