NULL pointer dereference in libheif - CVE-2025-43966
Published: January 20, 2026
Vulnerability identifier: #VU121773
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-43966
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service attack.
The vulnerability exists due to NULL pointer dereference within the ImageItem_iden() function in image-items/iden.cc. A remote attacker can pass a specially crafted file to the application and perform a denial of service attack.
Affected software
libheif
How to mitigate CVE-2025-43966
Install update from vendor's website.
libheif - update to 1.19.6