OpenEXR: Scratch buffer overflow decoding B44-compressed InputFile on ILP32
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| AcademySoftwareFoundation | openexr | 3.1.0 to before 3.2.11; 3.3.0 to before 3.3.13; 3.4.0 to before 3.4.14 | 3.2.11, 3.3.13, 3.4.14 | Patch available | CNA |
- openexr VendorAcademySoftwareFoundation Affected 3.1.0 to before 3.2.11; 3.3.0 to before 3.3.13; 3.4.0 to before 3.4.14 Fixed in 3.2.11, 3.3.13, 3.4.14 Patch available CNA
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:* | — | — | Academy Software Foundation |
- cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:* Versions — — ·Academy Software Foundation
Remediation
- Fix · CNA openexr (AcademySoftwareFoundation) Fixed in 3.2.11, 3.3.13, 3.4.14
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2026-59984
References
Other 4
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-92pq-9qv4-g68q
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.11
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.13
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.14
More AcademySoftwareFoundation vulnerabilities
- TI-2026-30739 OpenColorIO vulnerable to stack buffer overflow via unbounded `sscanf %s` in Spi3D (.spi3d) LUT parser CVSS 4.0HIGH 8.4
- TI-2026-38605 OpenEXR: Unhandled assert abort in HTJ2K decoder via crafted QCD marker (DoS) CVSS 4.0HIGH 7.1
- TI-2026-48281 OpenEXR: Heap out-of-bounds write in exrmultiview with subsampled channel union CVSS 3.1HIGH 7.1
- TI-2026-48279 OpenEXR: Heap buffer overflow in PyOpenEXR from literal/prefixed RGB channel name collision CVSS 3.1HIGH 7.1
- TI-2026-42768 OpenEXR: Heap OOB read in SampleCountChannel row when using nonzero dataWindow CVSS 3.1HIGH 7.1
- TI-2026-42338 OpenEXR: Out-of-bounds read in DeepImageChannel::row() for non-zero dataWindow origin CVSS 3.1HIGH 7.1
Sources
- CVE-2026-59984 · CVE Program
- CVE-2026-59984 · NVD
- FIRST EPSS
- CVE-2026-59984 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences