CVE-2026-45383
libde265 has a heap buffer overflow (OOB read) in decode_slice_unit_WPP() via out-of-bounds CtbAddrRStoTS access — libde265 <= v1.0.18
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.
INFO
Published Date :
July 21, 2026, 9:16 p.m.
Last Modified :
Oct. 24, 2026, 7:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update libde265 to version 1.0.19.
- Apply vendor patches for affected versions.
- Rebuild and redeploy applications using libde265.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45383.
| URL | Resource |
|---|---|
| https://github.com/strukturag/libde265/security/advisories/GHSA-wg9q-ppqw-6q38 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45383 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45383
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45383 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45383 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Added Translation Title: libde265 de strukturag, Description: libde265 es una implementación de código abierto del códec de video h.265. En las versiones anteriores a la 1.0.19, existe un desbordamiento de búfer de montón (lectura fuera de límites) en decoder_context::decode_slice_unit_WPP() en libde265/decctx.cc. Al decodificar una porción HEVC WPP (Procesamiento Paralelo de Frente de Onda), ctbAddrRS se calcula como ctbRow * ctbsWidth dentro del bucle de punto de entrada. Si los encabezados PPS/SPS se manipulan de modo que este valor exceda pps.CtbAddrRStoTS.size(), el acceso posterior al array pps.CtbAddrRStoTS[ctbAddrRS] lee más allá del final del vector asignado, lo que desencadena un desbordamiento de búfer de montón confirmado por AddressSanitizer. La versión 1.0.19 corrige el problema. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 22, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-45383', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-22T15:35:57.170282Z'} -
New CVE Received by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'strukturag', 'product': 'libde265', 'versions': [{'status': 'affected', 'version': '< 1.0.19'}]}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-125 Added Reference https://github.com/strukturag/libde265/security/advisories/GHSA-wg9q-ppqw-6q38