CVE-2025-64183Public exploit

Process crash via prematurely freed Python attribute

Published Nov 10, 2025 · Updated Nov 10, 2025

Use-after-free in OpenEXR's legacy Python adapter allows local users to crash processes through crafted temporary object attributes. PyObject_StealAttrString obtains a new attribute reference, decrements it immediately, and returns the dangling pointer to numeric conversion APIs. The flaw affects 3.2.0 through 3.2.4, 3.3.0 through 3.3.5, and 3.4.0 through 3.4.2; local execution of the legacy adapter is required, and the demonstrated consequence is a Python process crash.

CVSS severity7.5
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in OpenEXR's legacy Python adapter allows local users to crash processes through crafted temporary object attributes. PyObject_StealAttrString obtains a new attribute reference, decrements it immediately, and returns the dangling pointer to numeric conversion APIs. The flaw affects 3.2.0 through 3.2.4, 3.3.0 through 3.3.5, and 3.4.0 through 3.4.2; local execution of the legacy adapter is required, and the demonstrated consequence is a Python process crash.

The record

CVE
CVE-2025-64183
Published
Nov 10, 2025
Updated
Nov 10, 2025
Vendor
Academy Software Foundation
Product
OpenEXR
Classifications
CWE-416
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 3.2.0, < 3.2.5
  2. Affected versionversion=>= 3.3.0, < 3.3.6
  3. Affected versionversion=>= 3.4.0, < 3.4.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Academy Software Foundation · OpenEXRversion=>= 3.2.0, < 3.2.5; version=>= 3.3.0, < 3.3.6; version=>= 3.4.0, < 3.4.3

Published CVSS scores

5.5GitHub, Inc.CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo