High severity · published Jun 19, 2026
CVE-2026-49346
libde265 has a heap buffer overflow in de265_image_get_buffer via SPS dimension integer overflow
7.1
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libde265 · strukturag
< 1.1.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49346
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-49346
Patch
https://github.com/strukturag/libde265/commit/8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8
Exploit
https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86
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