Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Struktur | Libde265 | < 1.1.0 |
Related Weaknesses (CWE)
References
- https://github.com/strukturag/libde265/commit/8a1b5cf212f78e1c77cb46eb5d56e492a9Patch
- https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86ExploitVendor Advisory
- https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86ExploitVendor Advisory
FAQ
What is CVE-2026-49346?
CVE-2026-49346 is a vulnerability with a CVSS score of 7.1 (HIGH). 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...
How severe is CVE-2026-49346?
CVE-2026-49346 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-49346?
Check the references section above for vendor advisories and patch information. Affected products include: Struktur Libde265.