CVE-2026-33165
heap out-of-bounds write in libde265 1.0.16
Description
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.17, a crafted HEVC bitstream causes an out-of-bounds heap write confirmed by AddressSanitizer. The trigger is a stale ctb_info.log2unitSize after an SPS change where PicWidthInCtbsY and PicHeightInCtbsY stay constant but Log2CtbSizeY changes, causing set_SliceHeaderIndex to index past the allocated image metadata array and write 2 bytes past the end of a heap allocation. This issue has been patched in version 1.0.17.
INFO
Published Date :
March 20, 2026, 9:17 p.m.
Last Modified :
March 23, 2026, 8:09 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update libde265 to version 1.0.17.
- Apply security patches provided by the vendor.
- Recompile affected software using the updated library.
Public PoC/Exploit Available at Github
CVE-2026-33165 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2026-33165.
| URL | Resource |
|---|---|
| https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658 | Patch |
| https://github.com/strukturag/libde265/releases/tag/v1.0.17 | Release Notes |
| https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg | Exploit Vendor Advisory Patch |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-33165 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-2026-33165
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).
Security advisories and vulnerabilities discovered by Marlink Cyber
C
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-33165 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33165 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.
-
Initial Analysis by [email protected]
Mar. 23, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:struktur:libde265:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.17 Added Reference Type GitHub, Inc.: https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/strukturag/libde265/releases/tag/v1.0.17 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg Types: Exploit, Patch, Vendor Advisory -
New CVE Received by [email protected]
Mar. 20, 2026
Action Type Old Value New Value Added Description libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.17, a crafted HEVC bitstream causes an out-of-bounds heap write confirmed by AddressSanitizer. The trigger is a stale ctb_info.log2unitSize after an SPS change where PicWidthInCtbsY and PicHeightInCtbsY stay constant but Log2CtbSizeY changes, causing set_SliceHeaderIndex to index past the allocated image metadata array and write 2 bytes past the end of a heap allocation. This issue has been patched in version 1.0.17. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Added CWE CWE-787 Added Reference https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658 Added Reference https://github.com/strukturag/libde265/releases/tag/v1.0.17 Added Reference https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg