CVE-2026-49346
libde265 has a heap buffer overflow in de265_image_get_buffer via SPS dimension integer overflow
Description
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.1.0, a crafted H.265 bitstream with large SPS dimensions and 16-bit bit depth causes a signed integer overflow in `de265_image_get_buffer()` (`libde265/image.cc:128`). The overflow wraps the plane allocation size to a small value (~1 KB), but the subsequent `fill_image()` call computes the real size using `size_t`, writing ~4 GB into the undersized heap buffer. Version 1.1.0 patches the issue.
INFO
Published Date :
June 19, 2026, 9:17 p.m.
Last Modified :
June 26, 2026, 7:17 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 3.1 | HIGH | [email protected] |
Solution
- Update libde265 to version 1.1.0.
- Apply patches if updating is not possible.
- Validate buffer size calculations.
- Mitigate crafted bitstream input.
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-2026-49346.
| URL | Resource |
|---|---|
| https://github.com/strukturag/libde265/commit/8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8 | Patch |
| https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86 | Exploit Vendor Advisory |
| https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-49346 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-2026-49346
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-2026-49346 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-49346 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]
Jun. 26, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:struktur:libde265:*:*:*:*:*:*:*:* versions up to (excluding) 1.1.0 Added Reference Type GitHub, Inc.: https://github.com/strukturag/libde265/commit/8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86 Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86 Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 22, 2026
Action Type Old Value New Value Added Reference https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86 Added SSVC {'id': 'CVE-2026-49346', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-22T14:04:49.752955Z'} -
New CVE Received by [email protected]
Jun. 19, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'strukturag', 'product': 'libde265', 'versions': [{'status': 'affected', 'version': '< 1.1.0'}]}] Added Description libde265 is an open source implementation of the h.265 video codec. Prior to version 1.1.0, a crafted H.265 bitstream with large SPS dimensions and 16-bit bit depth causes a signed integer overflow in `de265_image_get_buffer()` (`libde265/image.cc:128`). The overflow wraps the plane allocation size to a small value (~1 KB), but the subsequent `fill_image()` call computes the real size using `size_t`, writing ~4 GB into the undersized heap buffer. Version 1.1.0 patches the issue. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H Added CWE CWE-190 Added Reference https://github.com/strukturag/libde265/commit/8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8 Added Reference https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86