Integer overflow in libde265 - CVE-2026-54240
Published: September 4, 2026
Vulnerability identifier: #VU146893
CSH Severity: Medium
CVSS v4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-54240
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose heap data and cause a denial of service.
The vulnerability exists due to signed integer overflow in the get_image_plane_at_pos pixel accessor variants when decoding a crafted HEVC bitstream. A remote attacker can supply a crafted HEVC bitstream to disclose heap data and cause a denial of service.
Exploitation requires HEVC picture dimensions exceeding the square root of INT32_MAX.
Affected software
libde265
How to mitigate CVE-2026-54240
Install security update from vendor's website.
libde265 - update to 1.1.1