Heap-based buffer overflow in OpenEXR - CVE-2025-12840
Published: December 4, 2025
Vulnerability identifier: #VU119134
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-12840
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error. A remote attacker can trick a victm to open a specially crafted EXR file, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
OpenEXR
Anolis OS
OpenEXR
OpenEXR-devel
OpenEXR-libs
OpenEXR-doc
Anolis OS
OpenEXR
OpenEXR-devel
OpenEXR-libs
OpenEXR-doc
How to mitigate CVE-2025-12840
Install updates from vendor's website.
OpenEXR - update to 3.4.3
OpenEXR - update to 3.4.4-1
OpenEXR-devel - update to 3.4.4-1
OpenEXR-libs - update to 3.4.4-1
OpenEXR-doc - update to 3.4.4-1
OpenEXR - update to 3.4.4-1
OpenEXR-devel - update to 3.4.4-1
OpenEXR-libs - update to 3.4.4-1
OpenEXR-doc - update to 3.4.4-1