Vulnerability details
CVE-2026-40244
AcademySoftwareFoundation openexr
OpenEXR has integer overflow in DWA setupChannelData planarUncRle pointer arithmetic (missed variant of CVE-2026-34589)
CVSS 4.0
8.4High
Official description
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:1722` performs `curc->width * curc->height` in `int32` arithmetic without a `(size_t)` cast. This is the same overflow pattern fixed in other locations by the recent CVE-2026-34589 batch, 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:1722`.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.4High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 8.2High | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| AcademySoftwareFoundation | openexr | >= 3.2.0, < 3.2.8 | CVEProject cvelistV5 (CNA) |
| AcademySoftwareFoundation | openexr | >= 3.3.0, < 3.3.10 | CVEProject cvelistV5 (CNA) |
| AcademySoftwareFoundation | openexr | >= 3.4.0, < 3.4.10 | CVEProject cvelistV5 (CNA) |
References and advisories
7- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-j526-66f6-fxhx x_refsource_CONFIRM
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.8 x_refsource_MISC
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.10 x_refsource_MISC
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.10 x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2026-40244 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2459955 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40244.json x_sadp-csaf-vex
Kolun on Telegram @kolunsec
Exploited CVEs, key news and a daily digest
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-04-21
- Last updated
- 2026-07-15
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.42%
Probability of exploitation in 30 days
37%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-190Integer Overflow or Wraparound