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Vulnerability · Published Apr 21, 2026 · Assigned by GitHub_M

CVE-2026-40244OpenEXR has integer overflow in DWA setupChannelData planarUncRle pointer arithmetic (missed variant of CVE-2026-34589)

High 8.2

In plain English

A high-severity integer overflow in openexr from AcademySoftwareFoundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.4%top 62.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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`.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.22openexr3.3.11-r0ALPINE-CVE-2026-40244
Alpine:v3.23openexr3.4.13-r0ALPINE-CVE-2026-40244
Alpine:v3.24openexr3.4.10-r0ALPINE-CVE-2026-40244
Debian:12openexrno fix listedDEBIAN-CVE-2026-40244
Debian:13openexrno fix listedDEBIAN-CVE-2026-40244
Debian:14openexr3.4.14-0.1DEBIAN-CVE-2026-40244
Ubuntu:26.10openexrno fix listedUBUNTU-CVE-2026-40244

Affected products (as reported)

VendorProductVersions
AcademySoftwareFoundation openexr >= 3.2.0, < 3.2.8>= 3.3.0, < 3.3.10>= 3.4.0, < 3.4.10

Weakness: CWE-190 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

References