strukturag libde265 up to 1.0.x libde265/image.cc de265_image_get_buffer small integer overflow

Summaryinfo

A vulnerability described as problematic has been identified in strukturag libde265 up to 1.0.x. This vulnerability affects the function de265_image_get_buffer of the file libde265/image.cc. Executing a manipulation of the argument small can lead to integer overflow. This vulnerability is handled as CVE-2026-49346. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in strukturag libde265 up to 1.0.x and classified as problematic. This vulnerability affects the function de265_image_get_buffer of the file libde265/image.cc. The manipulation of the argument small with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-49346 since 05/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 1.1.0 eliminates this vulnerability. Applying the patch 8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-38080). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• strukturag

Name

• libde265

Version

• 1.0

License

• open-source

Website

• Product: https://github.com/strukturag/libde265/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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