23 Oct 2026 15:48:27 UTC
libde265: Pixel accessor signed integer overflow causes heap OOB read/write
cve-program · CVE-2026-54240 · Published
CVE-2026-54240
libde265: Pixel accessor signed integer overflow causes heap OOB read/write
CVSS 3.1 7.4 HIGHCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-54240
Publishedlibde265 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.
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