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Vulnerability record · CVE-2026-54241 · published 11 September 2026

CVE-2026-54241: Heap-based buffer overflow vulnerability

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.

7.4 CVSS 3.1 High EPSS 0.39% · top 69.1% CWE-122 · Heap-based buffer overflowCWE-190 · Integer overflow Received
7.4CVSS 3.1 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
14 Sep 2026Last modified by NVD

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.

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

References

LinkTags
https://github.com/strukturag/libde265/security/advisories/GHSA-j2qq-x2xq-g9wr

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Source: NIST National Vulnerability Database (record CVE-2026-54241), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.