CVE-2026-54241

Publication date 1 July 2026

Last updated 16 September 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.4 · High

Score breakdown

Description

libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.1.1 use signed 32-bit arithmetic to calculate the sample adaptive offset input-buffer size, allowing a crafted HEVC stream with large dimensions and 16-bit luma samples to cause an integer overflow, an undersized allocation, and an out-of-bounds heap read that may expose heap data in decoded output or crash the decoder. Version 1.1.1 contains a patch.

Status

Package Ubuntu Release Status
libde265 26.04 LTS resolute
Fixed 1.0.16-1ubuntu0.1~esm1
25.10 questing Ignored end of life, was needs-triage
24.04 LTS noble
Fixed 1.0.15-1ubuntu0.1
22.04 LTS jammy
Fixed 1.0.8-1ubuntu0.3+esm2
20.04 LTS focal
Fixed 1.0.4-1ubuntu0.4+esm2
18.04 LTS bionic
Fixed 1.0.2-2ubuntu0.18.04.1~esm6
16.04 LTS xenial
Fixed 1.0.2-2ubuntu0.16.04.1~esm6

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libde265

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.4 · High

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-8573-1
    • libde265 vulnerabilities
    • 20 July 2026

Other references

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