CVE-2026-49295 — libde265 has an out-of-bounds write in process_reference_picture_set via predicted short-term RPS

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
strukturag / libde265	affected < 1.0.20

CWE

CWE-787

References

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

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/strukturag/libde265/security/advisories/GHSA-g2rg-wj66-w594