OpenEXR: Heap out-of-bounds write in exrmultiview with subsampled channel union
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · High
- Fix status
- Partial Red Hat: 6 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, exrmultiview can write past a heap allocation when it combines two attacker-supplied, individually valid scanline EXR files whose union dataWindow is not aligned to one view's channel subsampling. The utility allocates sampled channel storage using a truncated union_width / xSampling, then reads the sampled input through a Slice based on the misaligned union window, producing a heap out-of-bounds write. The trigger is normal public-tool processing, such as exrmultiview left A.exr right B.exr out.exr with crafted but valid inputs, so this is not solely an API or caller-precondition issue. 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 | 3.3.0 to before 3.3.13; 3.4.0 to before 3.4.14; before 3.2.11 | 3.3.13, 3.4.14, 3.2.11 | Patch available | CNA |
- openexr VendorAcademySoftwareFoundation Affected 3.3.0 to before 3.3.13; 3.4.0 to before 3.4.14; before 3.2.11 Fixed in 3.3.13, 3.4.14, 3.2.11 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 3.3.13, 3.4.14, 3.2.11
Red Hat 3 advisories
- RHSA-2026:82345 Released 2026-10-13 · Red Hat rating ImportantOpenEXR security update
- Red Hat Enterprise Linux AppStream (v. 8) OpenEXR-2.2.0-12.el8_10.3, OpenEXR-libs-2.2.0-12.el8_10.3
- Red Hat Enterprise Linux CRB (v. 8) OpenEXR-devel-2.2.0-12.el8_10.3
- RHSA-2026:69608 Released 2026-09-22 · Red Hat rating Importantopenexr security update
- Red Hat Enterprise Linux AppStream (v. 9) openexr-3.1.1-3.el9_8.4, openexr-libs-3.1.1-3.el9_8.4
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) openexr-devel-3.1.1-3.el9_8.4
- RHSA-2026:69609 Released 2026-09-22 · Red Hat rating Importantopenexr security update
- Red Hat Enterprise Linux AppStream (v. 10) openexr-3.1.10-8.el10_2.4, openexr-libs-3.1.10-8.el10_2.4
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) openexr-devel-3.1.10-8.el10_2.4
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:69609 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2026:82345 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:69608 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2026:82345 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) | Fixed | RHSA-2026:69609 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2026:69608 |
Not affected: 1 product
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-68515
- 2026-10-14 Fix available: RHSA-2026:82345 · Red Hat
- 2026-10-15 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · Red Hat
References
Other 4
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-gjf7-wjjw-xq56
- https://github.com/AcademySoftwareFoundation/openexr/commit/77ee19c021398b1c56f32c3af8347e365dbd4f33
- https://github.com/AcademySoftwareFoundation/openexr/commit/c644ac2dfeac82939c81a8551d6f4b7859f63add
- https://github.com/AcademySoftwareFoundation/openexr/commit/e2300a3d54a93d20a36a86b82f3a506c4c91476f
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-2026-48279 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
- TI-2026-42337 OpenEXR: exrmetrics deep pixelmode heap buffer overflow CVSS 3.1HIGH 7.1
Sources
- CVE-2026-68515 · CVE Program
- CVE-2026-68515 · NVD
- FIRST EPSS
- CVE-2026-68515 · 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