Medium severity · published Aug 25, 2026
CVE-2026-59984
OpenEXR: Scratch buffer overflow decoding B44-compressed InputFile on ILP32
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. OpenEXR versions 3.1.0 through 3.2.10, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13 are vulnerable on ILP32 builds to an out-of-bounds write. When a crafted B44-compressed scanline EXR causes the logical scratch size to truncate before allocation and uncompress_b44_impl() writes using the attacker-controlled channel width, allowing denial of service and memory corruption. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openexr · AcademySoftwareFoundation
>= 3.1.0, < 3.2.11; >= 3.3.0, < 3.3.13; >= 3.4.0, < 3.4.14 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59984
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59984
github.com
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.11
github.com
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.13
github.com
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.14
github.com
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-92pq-9qv4-g68q
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