CVE-2026-45383
Publication date 1 July 2026
Last updated 7 August 2026
Ubuntu priority
Description
libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.0.19 have a heap buffer overflow (out-of-bounds READ) exists in `decoder_context::decode_slice_unit_WPP()` in `libde265/decctx.cc`. When decoding a WPP (Wavefront Parallel Processing) HEVC slice, `ctbAddrRS` is computed as `ctbRow * ctbsWidth` inside the entry-point loop. If the PPS/SPS headers are crafted so that this value exceeds `pps.CtbAddrRStoTS.size()`, the subsequent array access `pps.CtbAddrRStoTS[ctbAddrRS]` reads past the end of the allocated vector, triggering a heap-buffer-overflow confirmed by AddressSanitizer. Version 1.0.19 patches the issue.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libde265 | 26.04 LTS resolute |
Fixed 1.0.16-1ubuntu0.1~esm1
|
| 24.04 LTS noble |
Fixed 1.0.15-1ubuntu0.1
|
|
| 22.04 LTS jammy |
Fixed 1.0.8-1ubuntu0.3+esm2
|
|
| 20.04 LTS focal |
Fixed 1.0.4-1ubuntu0.4+esm2
|
|
| 18.04 LTS bionic |
Fixed 1.0.2-2ubuntu0.18.04.1~esm6
|
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CVSS version: CVSS v4.0
Base score
6.9 · Medium
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
References
Related Ubuntu Security Notices (USN)
- USN-8573-1
- libde265 vulnerabilities
- 20 July 2026