How severe is CVE-2025-64181?

CVE-2025-64181 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-64181 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64181?

CVE-2025-64181 affects Openexr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64181?

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-2025-64181 have an EU (EUVD) identifier?

Yes. CVE-2025-64181 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-50828.

When was CVE-2025-64181 published?

CVE-2025-64181 was published on 2025-11-10 and last updated on 2026-06-17.

CVE-2025-64181

CVE-2025-64181 is a high-severity vulnerability in Openexr with a CVSS 3.x base score of 7.5. 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-457.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 2.0
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-50828
Weakness: CWE-457
Affected product: Openexr
Published: 2025-11-10
Last modified: 2026-06-17

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2, while fuzzing `openexr_exrcheck_fuzzer`, Valgrind reports a conditional branch depending on uninitialized data inside `generic_unpack`. This indicates a use of uninitialized memory. The issue can result in undefined behavior and/or a potential crash/denial of service. Versions 3.3.6 and 3.4.3 fix the issue.

Frequently asked questions

What is CVE-2025-64181?: OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.3.0 through 3.3.5 and 3.4.0 through 3.4.2, while fuzzing `openexr_exrcheck_fuzzer`, Valgrind reports a conditional branch depending on uninitialized data inside `generic_unpack`. This indicates a use of uninitialized memory. The issue can result in undefined behavior and/or a potential crash/denial of service. Versions 3.3.6 and 3.4.3 fix the issue.
How severe is CVE-2025-64181?: CVE-2025-64181 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-64181 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64181?: CVE-2025-64181 affects Openexr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64181?: 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-2025-64181 have an EU (EUVD) identifier?: Yes. CVE-2025-64181 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-50828.
When was CVE-2025-64181 published?: CVE-2025-64181 was published on 2025-11-10 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Openexr

CVE-2026-42217 — Critical (CVSS 9.8): OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the…
CVE-2026-42216 — Critical (CVSS 9.1): OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the…
CVE-2025-48072 — Critical (CVSS 9.1): OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the…
CVE-2023-5841 — Critical (CVSS 9.1): Due to a failure in validating the number of scanline samples of a OpenEXR file containing deep scanline data, Academy…
CVE-2026-41142 — High (CVSS 8.8): OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the…
CVE-2021-23169 — High (CVSS 8.8): A heap-buffer overflow was found in the copyIntoFrameBuffer function of OpenEXR in versions before 3.0.1. An attacker…

All CVEs affecting Openexr →

Other CWE-457 vulnerabilities

CVE-2026-6748 — Critical (CVSS 9.8): Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR…
CVE-2025-54874 — Critical (CVSS 9.8): OpenJPEG is an open-source JPEG 2000 codec. In OpenJPEG from 2.5.1 through 2.5.3, a call to opj_jp2_read_header may…
CVE-2025-53644 — Critical (CVSS 9.8): OpenCV is an Open Source Computer Vision Library. Versions 4.10.0 and 4.11.0 have an uninitialized pointer variable on…
CVE-2026-14405 — Critical (CVSS 9.6): Uninitialized Use in V8 in Google Chrome prior to 150.0.7871.46 allowed a remote attacker to execute arbitrary code…
CVE-2026-13825 — High (CVSS 8.8): Uninitialized Use in Dawn in Google Chrome prior to 150.0.7871.47 allowed a remote attacker to potentially exploit heap…
CVE-2025-5749 — High (CVSS 8.8): WOLFBOX Level 2 EV Charger BLE Encryption Keys Uninitialized Variable Authentication Bypass Vulnerability. This…

Browse all CWE-457 vulnerabilities →