CVE-2026-54240: Strukturag LIBDE265

High severity, CVSS 7.4. EPSS: 0.4% chance of exploitation in the next 30 days.

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 pixel offsets, allowing a crafted HEVC stream with large image dimensions to trigger an integer overflow and cause out-of-bounds heap reads or writes, potentially disclosing data, corrupting memory, or crashing the decoder. Version 1.1.1 contains a patch.

Affected products

• Strukturag LIBDE265: before 1.1.1 (fixed in 1.1.1)

Published 2026-09-11. Last modified 2026-09-30.