Out-of-bounds write in OpenEXR - CVE-2026-34544
Published: April 8, 2026
Vulnerability identifier: #VU125327
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-34544
CWE-ID: CWE-787
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 corrupt memory.
The vulnerability exists due to out-of-bounds write in uncompress_b44_impl() in internal_b44.c when decoding a crafted B44 or B44A EXR file via exr_decoding_run(). A remote attacker can supply a specially crafted EXR file to cause a denial of service and corrupt memory.
User interaction is required to open or decode the crafted file.
How to mitigate CVE-2026-34544
Install security update from vendor's website.