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CVE-2026-34544

OpenEXR: integer overflow to OOB write in uncompress_b44_impl()

Published: Apr 1, 2026Updated: Apr 7, 2026 Sources: CVE List NVDCWE-190
7.3HIGH
NVD MITRE
EPSS Score
0.2%
Top 84.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:RS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-190CWE-787

Affected Products

openexrAcademySoftwareFoundation
Library
OSS Libraries / generic-library
openexropenexr
LibraryLibrary
OSS Libraries / generic-library
academysoftwarefoundationoss-projectUSOSS Librariesaka openexr, openimageio, materialx
openexross-projectOSS Librariesaka open exr

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
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References

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-h762-rhv3-h25v
github.com
https://github.com/AcademySoftwareFoundation/openexr/commit/35e7aa35e22c1975606be86e859f31cc1fc598ee
github.com
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.8
github.com

Timeline

Published
Apr 1, 2026
Last Updated
Apr 7, 2026

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