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Fencer Vulns
high 7.8

CVE-2025-12840 json

Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

published 2025-12-23 10 mo ago modified 2026-10-19 20 d ago also EUVD-2025-204962 , JLSEC-2026-137

cvss
7.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits
0
none known

Summary

Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Academy Software Foundation OpenEXR. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of EXR files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-27948.

Patch / fix

  • julia OpenEXR_jll 3.4.4+0
  • openexr openexr 3.4.3
  • openexr Debian 14 3.4.6+ds-1

debian advisories DEBIAN-CVE-2025-12840

  • openexr SLES for SAP applications 16.0, SLES 16.0 3.2.2-160000.4.1

suse advisories SUSE-SU-2025:21189-1

  • openexr openSUSE Leap 16.0 3.2.2-160000.4.1
  • openexr openSUSE Tumbleweed 3.4.3-2.1

opensuse advisories openSUSE-SU-2025:20148-1openSUSE-SU-2025:15759-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-12840 updated cvss 7.8

OpenEXR: OpenEXR: Remote Code Execution via EXR file parsing heap-based buffer overflow

  • Red Hat Enterprise Linux 6 OpenEXR, OpenEXR-libs
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 OpenEXR, OpenEXR-libs Red Hat Enterprise Linux 8 OpenEXR, OpenEXR-libs Red Hat Enterprise Linux 9 OpenEXR Red Hat Enterprise Linux 10 OpenEXR
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
10 mo ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
OSV 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia OpenEXR_jll
<3.4.4+0
3.4.4+0

Affected products

  • Academy Software Foundation OpenEXR

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.