Bug#1132580: openexr: CVE-2026-34543

[Salvatore Bonaccorso]

Source: openexr
Version: 3.4.6+ds-4
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for openexr.

CVE-2026-34543[0]:
| OpenEXR provides the specification and reference implementation of
| the EXR file format, an image storage format for the motion picture
| industry. From version 3.4.0 to before version 3.4.8, sensitive
| information from heap memory may be leaked through the decoded pixel
| data (information disclosure). This occurs under default settings;
| simply reading a malicious EXR file is sufficient to trigger the
| issue, without any user interaction. This issue has been patched in
| version 3.4.8.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-34543
    https://www.cve.org/CVERecord?id=CVE-2026-34543
[1] https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w-m432
[2] https://github.com/AcademySoftwareFoundation/openexr/commit/5f6d0aaa9e43802917af7db90f181e88e083d3b8

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore