OpenEXR: Scratch buffer overflow decoding B44-compressed InputFile on ILP32
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.
- Published
- Aug 25, 2026
- Updated
- Sep 9, 2026
- EPSS
- 0.2% · 6th percentile
- CWE
- CWE-787
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Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- proof of concept
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · GitHub_M
- 5.5
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
AcademySoftwareFoundation openexr
- >= 3.1.0, < 3.2.11, >= 3.3.0, < 3.3.13, >= 3.4.0, < 3.4.14affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | openexr | all versions | — |
| Debian:14 | openexr | before 3.4.14-0.1 | 3.4.14-0.1 |
| openSUSE:Leap 16.0 | openexr | before 3.2.2-160000.10.1 | 3.2.2-160000.10.1 |
| openSUSE:Tumbleweed | openexr | before 3.4.14-1.1 | 3.4.14-1.1 |
| SUSE:Linux Enterprise Server 16.0 | openexr | before 3.2.2-160000.10.1 | 3.2.2-160000.10.1 |
Same product
academysoftwarefoundation: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-68515OpenEXR: Heap out-of-bounds write in exrmultiview with subsampled channel union28Monitor
- CVE-2026-68513OpenEXR: Heap buffer overflow in PyOpenEXR from literal/prefixed RGB channel name collision28Monitor
- CVE-2026-59981OpenEXR: Heap OOB read in SampleCountChannel row when using nonzero dataWindow28Monitor
- CVE-2026-59982OpenEXR: DWAA InputFile AC buffer overflow on ILP32 platforms28Monitor
- CVE-2026-59189OpenEXR: Out-of-bounds read in DeepImageChannel::row() for non-zero dataWindow origin28Monitor
- CVE-2026-59187OpenEXR: exrmetrics deep pixelmode heap buffer overflow28Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:openexr | 3.4.14-0.1 · Debian:14 | Package registry (OSV) |
| opensuse:openexr | 3.4.14-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| suse:openexr | 3.2.2-160000.10.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-550591 days apartOpenEXR: OpenEXRUtil SampleCountChannel row setter heap has an out-of-bounds write vulnerability24Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.11
- github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.13
- github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.14
- github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-92pq-9qv4-g68q
Vendor advisories and official records. Exploit/PoC links are deliberately left out.