CVE-2026-34544

OpenEXR: integer overflow to OOB write in uncompress_b44_impl()

State: Published
Severity: 8.4 High
Published: Apr 1, 2026
Updated: Apr 2, 2026
Reserved: Mar 30, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.4 High	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	GitHub_M

Weaknesses

CWE-190 Integer Overflow or Wraparound
CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
openexrAcademySoftwareFoundation	>= 3.4.0, < 3.4.8Affected

References

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