🛡️ CVE-2026-40250 — openexr

🟠 CVSS 7.1 — High ✅ No Known Exploit CWE-190 NVD
7.1
CVSS Score
0 Low4 Medium7 High9 Critical10

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: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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity high, availability high.

Weakness class

CVE-2026-40250 is classified as CWE-190: Integer Overflow or Wraparound. Arithmetic produces a value too large for its type and wraps around, so a later size or bounds check passes when it should not.

Affected software

CVE-2026-40250 is recorded against 1 package.

  • openexr (from 3.4.0 up to 3.4.10)

Timeline and source

Published on 21 April 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
github.com
github.com
github.com

CVE-2026-40250 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 7.1
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
CWE CWE-190
Public Exploit ✅ No
Source NVD
Published 2026-04-21
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
openexr 3.4.0 3.4.10

Similar Threats

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