High severity · published Sep 11, 2026
CVE-2026-54241
libde265: SAO sequential filter heap buffer overflow via signed integer overflow
7.4
CVSS
0.4%
EPSS
No
On KEV
Description
libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.1.1 use signed 32-bit arithmetic to calculate the sample adaptive offset input-buffer size, allowing a crafted HEVC stream with large dimensions and 16-bit luma samples to cause an integer overflow, an undersized allocation, and an out-of-bounds heap read that may expose heap data in decoded output or crash the decoder. Version 1.1.1 contains a patch.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libde265 · strukturag
< 1.1.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54241
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-54241
github.com
https://github.com/strukturag/libde265/security/advisories/GHSA-j2qq-x2xq-g9wr
More from libde265
7.5
CVE-2026-33164
NULL Pointer Dereference in libde265
7.4
CVE-2026-54240
libde265: Pixel accessor signed integer overflow causes heap OOB read/write
7.1
CVE-2026-49346
libde265 has a heap buffer overflow in de265_image_get_buffer via SPS dimension integer overflow
7.1
CVE-2026-49295
libde265 has an out-of-bounds write in process_reference_picture_set via predicted short-term RPS
6.9
CVE-2026-45383
libde265 has a heap buffer overflow (OOB read) in decode_slice_unit_WPP() via out-of-bounds CtbAddrRStoTS access — libde265 <= v1.0.18