CVE-2026-49346

Description

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.1.0, a crafted H.265 bitstream with large SPS dimensions and 16-bit bit depth causes a signed integer overflow in `de265_image_get_buffer()` (`libde265/image.cc:128`). The overflow wraps the plane allocation size to a small value (~1 KB), but the subsequent `fill_image()` call computes the real size using `size_t`, writing ~4 GB into the undersized heap buffer. Version 1.1.0 patches the issue.

PUBLISHED Reserved 2026-05-29 | Published 2026-06-19 | Updated 2026-06-19 | Assigner GitHub_M

Problem types

CWE-190: Integer Overflow or Wraparound

Product status

References

github.com/...bde265/security/advisories/GHSA-vv8h-932h-7r86

github.com/...ommit/8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8

cve.org (CVE-2026-49346)

nvd.nist.gov (CVE-2026-49346)

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