What is CVE-2026-54241?

CVE-2026-54241 is a high-severity vulnerability in Strukturag Libde265, classified under Heap-based Buffer Overflow. CVSS score: 7.4/10. Published 2026-09-11.

How severe is CVE-2026-54241?

High severity. CVSS v3 base score is 7.4 out of 10.

Buffer overflow in Strukturag Libde265

CVE-2026-54241

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.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 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.

Affected products

Strukturag Libde265 — versions < 1.1.1

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54241?: CVE-2026-54241 is a high-severity vulnerability in Strukturag Libde265, classified under Heap-based Buffer Overflow. CVSS score: 7.4/10. Published 2026-09-11.
How severe is CVE-2026-54241?: High severity. CVSS v3 base score is 7.4 out of 10.