Vulnerability · Published Jun 19, 2026 · Assigned by GitHub_M
CVE-2026-49346libde265 has a heap buffer overflow in de265_image_get_buffer via SPS dimension integer overflow
High 7.1
In plain English
A high-severity integer overflow in libde265 from strukturag. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | libde265 | 1.1.3-r0 | ALPINE-CVE-2026-49346 |
| Debian:12 | libde265 | 1.0.11-1+deb12u3 | DEBIAN-CVE-2026-49346 |
| Debian:13 | libde265 | 1.0.15-1+deb13u1 | DEBIAN-CVE-2026-49346 |
| Debian:14 | libde265 | 1.1.1-1 | DEBIAN-CVE-2026-49346 |
| Ubuntu:24.04:LTS | libde265 | 1.0.15-1ubuntu0.1 | USN-8573-1 |
| Ubuntu:24.04:LTS | libde265 | 1.0.15-1ubuntu0.1 | UBUNTU-CVE-2026-49346 |
| Ubuntu:25.10 | libde265 | no fix listed | UBUNTU-CVE-2026-49346 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| strukturag | libde265 | < 1.1.0 |
Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H