CVE-2026-49295

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted H.265 bitstream can cause an out-of-bounds array write in `decoder_context::process_reference_picture_set()` (`libde265/decctx.cc:1376`). The root cause is a missing aggregate bound check on predicted short-term reference picture set entries. Individual list sizes are validated, but the combined count after predicted RPS construction can exceed the 16-entry `PocStFoll` array, writing at index 16. Version 1.0.20 patches the issue.

Score

CVSS 3.1 7.1 High

Status

Analyzed - security-advisories@github.com

Published

2026-06-19

Last modified

2026-10-25

Weaknesses

CWE-787

Affected products

• Libde265 (Struktur)
• Libde265 (Strukturag)

References

• https://github.com/strukturag/libde265/security/advisories/GHSA-g2rg-wj66-w594
• https://github.com/strukturag/libde265/commit/691f3a3c55b3d32478c4a49895dee061a282652b