Integer overflow in OpenEXR - CVE-2026-34380
Published: April 8, 2026
Vulnerability identifier: #VU125331
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-34380
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenEXR
Affected software:
OpenEXR
OpenEXR
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service and modify memory.
The vulnerability exists due to integer overflow or wraparound in undo_pxr24_impl() in src/lib/OpenEXRCore/internal_pxr24.c when parsing a crafted PXR24-compressed EXR file. A remote attacker can supply a specially crafted EXR file to cause a denial of service and modify memory.
User interaction is required to open or process the crafted file, and exploitation requires a FLOAT channel using PXR24 compression.
How to mitigate CVE-2026-34380
Install security update from vendor's website.