TI-2025-39625 Aliases CVE-2025-64182 GHSA-vh63-9mqx-wmjr

OpenEXR has buffer overflow in PyOpenEXR_old's channels() and channel()

MEDIUM 60CWE-120Published 2025-11-10 · Updated 2025-11-14

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.2.0 through 3.2.4, 3.3.0 through 3.3.5, and 3.4.0 through 3.4.2, a memory safety bug in the legacy OpenEXR Python adapter (the deprecated OpenEXR.InputFile wrapper) allow crashes and likely code execution when opening attacker-controlled EXR files or when passing crafted Python objects. Integer overflow and unchecked allocation in InputFile.channel() and InputFile.channels() can lead to heap overflow (32 bit) or a NULL deref (64 bit). Versions 3.2.5, 3.3.6, and 3.4.3 contain a patch for the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0026 17th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed openexr (AcademySoftwareFoundation): 3.2.5, 3.3.6, 3.4.3OpenEXR (PyPI): 3.2.5, 3.3.6, 3.4.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
AcademySoftwareFoundation	openexr	3.2.0 to before 3.2.5; 3.3.0 to before 3.3.6; 3.4.0 to before 3.4.3	3.2.5, 3.3.6, 3.4.3	Patch available	CNA
—	OpenEXR (PyPI)	3.2.0 to before 3.2.5	3.2.5	Patch available	GHSA-vh63-9mqx-wmjr
—	OpenEXR (PyPI)	3.3.0 to before 3.3.6	3.3.6	Patch available	GHSA-vh63-9mqx-wmjr
—	OpenEXR (PyPI)	3.4.0 to before 3.4.3	3.4.3	Patch available	GHSA-vh63-9mqx-wmjr

openexr VendorAcademySoftwareFoundation Affected 3.2.0 to before 3.2.5; 3.3.0 to before 3.3.6; 3.4.0 to before 3.4.3 Fixed in 3.2.5, 3.3.6, 3.4.3 Patch available CNA
OpenEXR (PyPI) Vendor— Affected 3.2.0 to before 3.2.5 Fixed in 3.2.5 Patch available GHSA-vh63-9mqx-wmjr
OpenEXR (PyPI) Vendor— Affected 3.3.0 to before 3.3.6 Fixed in 3.3.6 Patch available GHSA-vh63-9mqx-wmjr
OpenEXR (PyPI) Vendor— Affected 3.4.0 to before 3.4.3 Fixed in 3.4.3 Patch available GHSA-vh63-9mqx-wmjr

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:openexr:openexr::::::::	3.2.0 to before 3.2.5; 3.3.0 to before 3.3.6; 3.4.0 to before 3.4.3	Vulnerable	Academy Software Foundation

cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:* Versions 3.2.0 to before 3.2.5; 3.3.0 to before 3.3.6; 3.4.0 to before 3.4.3 Vulnerable ·Academy Software Foundation

Remediation

Fix · CNA openexr (AcademySoftwareFoundation) Fixed in 3.2.5, 3.3.6, 3.4.3
Fix · GHSA-vh63-9mqx-wmjr OpenEXR (PyPI) Fixed in 3.2.5 Advisory →
Fix · GHSA-vh63-9mqx-wmjr OpenEXR (PyPI) Fixed in 3.3.6 Advisory →
Fix · GHSA-vh63-9mqx-wmjr OpenEXR (PyPI) Fixed in 3.4.3 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 5 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2025-64182
2026-10-03 Alias added: GHSA-vh63-9mqx-wmjr

References

Exploit 1

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vh63-9mqx-wmjr

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2025-64182

Other 2

TI-2026-30739 OpenColorIO vulnerable to stack buffer overflow via unbounded `sscanf %s` in Spi3D (.spi3d) LUT parser CVSS 4.0HIGH 8.4
TI-2026-38605 OpenEXR: Unhandled assert abort in HTJ2K decoder via crafted QCD marker (DoS) CVSS 4.0HIGH 7.1
TI-2026-48281 OpenEXR: Heap out-of-bounds write in exrmultiview with subsampled channel union CVSS 3.1HIGH 7.1
TI-2026-48279 OpenEXR: Heap buffer overflow in PyOpenEXR from literal/prefixed RGB channel name collision CVSS 3.1HIGH 7.1
TI-2026-42768 OpenEXR: Heap OOB read in SampleCountChannel row when using nonzero dataWindow CVSS 3.1HIGH 7.1
TI-2026-42338 OpenEXR: Out-of-bounds read in DeepImageChannel::row() for non-zero dataWindow origin CVSS 3.1HIGH 7.1

See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences