How severe is CVE-2026-40244?

CVE-2026-40244 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-40244 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40244?

CVE-2026-40244 affects Openexr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40244?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-40244 have an EU (EUVD) identifier?

Yes. CVE-2026-40244 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24046.

When was CVE-2026-40244 published?

CVE-2026-40244 was published on 2026-04-21 and last updated on 2026-06-30.

CVE-2026-40244

CVE-2026-40244 is a high-severity vulnerability in Openexr with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v4: 8.4
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-24046
Weakness: CWE-190
Affected product: Openexr
Published: 2026-04-21
Last modified: 2026-06-30

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`.

Frequently asked questions

What is CVE-2026-40244?: 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`.
How severe is CVE-2026-40244?: CVE-2026-40244 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-40244 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40244?: CVE-2026-40244 affects Openexr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40244?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-40244 have an EU (EUVD) identifier?: Yes. CVE-2026-40244 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24046.
When was CVE-2026-40244 published?: CVE-2026-40244 was published on 2026-04-21 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*

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