Integer overflow in Academysoftwarefoundation Openexr
CVE-2026-40250
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.4.0 through 3.4.9, 3.3.0 through 3.3.9, and 3.2.0 through 3.2.7, `internal_dwa_compressor.h:1040` performs `chan->width * chan->bytes_per_element` in `int32` arithmetic without a `(size_t)` cast. This is the same overflow pattern fixed in other decoders by CVE-2026-34589/34588/34544, but this line was missed. Versions 3.4.10, 3.3.10, and 3.2.8 contain a fix that addresses `internal_dwa_compressor.h:1040`.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (13.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.002 · change: -0.002
Affected products
- Academysoftwarefoundation Openexr — versions >= 3.2.0, < 3.2.8, >= 3.3.0, < 3.3.10, >= 3.4.0, < 3.4.10
- Openexr
Weakness classification (CWE)
References
- github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-m5qw-23x2… (Mitigation, Vendor Advisory)
- github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.8 (Product, Release Notes)
- github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.10 (Product, Release Notes)
- github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.10 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-40250?
- CVE-2026-40250 is a high-severity vulnerability in Academysoftwarefoundation Openexr, classified under Integer Overflow or Wraparound. CVSS score: 7.1/10. Published 2026-04-21.
- How severe is CVE-2026-40250?
- High severity. CVSS v3 base score is 7.1 out of 10.