NULL pointer dereference in OpenEXR - CVE-2026-55371
Published: June 23, 2026
Vulnerability identifier: #VU135032
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-55371
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in exr_attr_set_bytes() and exr_attr_bytes_create() when processing a bytes attribute with a positive hint length and a NULL type_hint pointer. A local user can supply a crafted bytes attribute structure to cause a denial of service.
The issue is reachable through the public OpenEXRCore C API.
Affected software
OpenEXR
How to mitigate CVE-2026-55371
Install security update from vendor's website.
OpenEXR - update to 3.4.13