CVE-2026-45383 Details
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.
A heap buffer overflow vulnerability has been identified in libde265 versions prior to 1.0.19. The issue occurs in the function decode_slice_unit_WPP() within libde265/decctx.cc. When decoding a Wavefront Parallel Processing (WPP) HEVC slice, the variable ctbAddrRS is calculated based on the slice segment address and the width of the coding tree blocks. If the Picture Parameter Set (PPS) or Sequence Parameter Set (SPS) headers are manipulated such that this computed address exceeds the bounds of the CtbAddrRStoTS vector, the resulting out-of-bounds read can access memory beyond the allocated vector, leading to a heap buffer overflow. This vulnerability has been confirmed by AddressSanitizer.
Users can upgrade to libde265 version 1.0.19 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 21, 2026CISA-ADP
Assessed Jul 22, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/strukturag/libde265/security/advisories/GHSA-wg9q-ppqw-6q38 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| libde265 | <= 1.0.18 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 22, 2026 | CVE Modified | CISA-ADP |
| Jul 21, 2026 | New CVE Received | [email protected] |