CVE-2026-49346
High
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.
SeverityHigh
CVSS7.1
Exploit probability—
ProductStruktur Libde265
PublishedJun 19, 2026
First seenJun 19, 2026
Weakness typeCWE-190Integer overflow
How to fix
Update
- struktur libde2651.1.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| struktur libde265 | v < 1.1.0 | 1.1.0 |
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