CVE-2026-34544 HIGH

CVE-2026-34544: OpenEXR: integer overflow to OOB write in uncompress_b44_impl()

Vendor Academysoftwarefoundation
Product openexr
Weakness CWE-190
Published April 1, 2026
Last update April 2, 2026
View on NVD All CVEs

CVSS base score

8.4/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From version 3.4.0 to before version 3.4.8, a crafted B44 or B44A EXR file can cause an out-of-bounds write in any application that decodes it via exr_decoding_run(). Consequences range from immediate crash (most likely) to corruption of adjacent heap allocations (layout-dependent). This issue has been patched in version 3.4.8.

Key dates

02Disclosure timeline

April 1, 2026 CVE published
April 2, 2026 Record updated