CVE-2026-45382
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.19, `decoder_context::decode_slice_unit_tiles` (libde265/decctx.cc:920) reads `pps.CtbAddrRStoTS[ctbAddrRS]` at line 966 where `ctbAddrRS = ctbY * ctbsWidth + ctbX` is computed from PPS-supplied `colBd[]`/`rowBd[]` arrays without validating the result against `CtbAddrRStoTS.size() == sps->PicSizeInCtbsY`. A malformed PPS that passes `set_derived_values` but encodes geometry inconsistent with the SPS produces a `ctbAddrRS` past the allocation, causing a 4-byte heap-buffer-overflow READ. Version 1.0.19 fixes the issue.
- Score
- CVSS 4.0 6.9 Medium
- Status
- Deferred - security-advisories@github.com
- Published
- 2026-07-21
- Last modified
- 2026-10-24
- Weaknesses
- CWE-125
Affected products
References
- https://github.com/strukturag/libde265/security/advisories/GHSA-hwhx-x2mq-ccr9
