| Name | CVE-2026-34378 |
| Description | OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1133188 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| openexr (PTS) | bullseye (security), bullseye | 2.5.4-2+deb11u1 | fixed |
| bookworm | 3.1.5-5 | fixed | |
| trixie | 3.1.13-2 | fixed | |
| forky, sid | 3.4.6+ds-4 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| openexr | source | bullseye | (not affected) | |||
| openexr | source | bookworm | (not affected) | |||
| openexr | source | trixie | (not affected) | |||
| openexr | source | (unstable) | (unfixed) | 1133188 |
[trixie] - openexr <not-affected> (Vulnerable code not present)
[bookworm] - openexr <not-affected> (Vulnerable code not present)
[bullseye] - openexr <not-affected> (Vulnerable code not present)
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-v76p-4qvv-vh4g
https://github.com/AcademySoftwareFoundation/openexr/pull/2321
https://github.com/AcademySoftwareFoundation/openexr/commit/088859fb6199e56824c4c9ed60afc825261bfea9 (main)
https://github.com/AcademySoftwareFoundation/openexr/commit/7a1c64ca74d12bf5f64a912d4e12a651689f8652 (v3.4.9-rc)