Heap-based buffer overflow in OpenEXR - #VU152739
Published: September 29, 2026
Vulnerability identifier: #VU152739
CSH Severity: High
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service or modify adjacent heap memory.
The vulnerability exists due to a heap-based buffer overflow in the OpenEXRCore ZSTD deep-scanline decoder when processing a crafted deep-scanline EXR file with ZSTD compression. A remote attacker can supply a crafted EXR file with a declared unpacked size smaller than the sample-derived segment length to cause a denial of service or modify adjacent heap memory.
User interaction is required to process the crafted EXR file.
Affected software
OpenEXR
Remediation
Install security update from vendor's website.
OpenEXR - update to 3.5.1