CVE-2026-27622

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In CompositeDeepScanLine::readPixels, per-pixel totals are accumulated in vector<unsigned int> total_sizes for attacker-controlled large counts across many parts, total_sizes[ptr] wraps modulo 2^32. overall_sample_count is then derived from wrapped totals and used in samples[channel].resize(overall_sample_count). Decode pointer setup/consumption proceeds with true sample counts, and write operations in core unpack (generic_unpack_deep_pointers) overrun the undersized composite sample buffer. This vulnerability is fixed in v3.2.6, v3.3.8, and v3.4.6.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27622.json

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-cr4v-6jm6-4963

https://bugzilla.redhat.com/show_bug.cgi?id=2444251

https://access.redhat.com/security/cve/CVE-2026-27622

https://access.redhat.com/errata/RHSA-2026:8888

https://access.redhat.com/errata/RHSA-2026:8872

https://access.redhat.com/errata/RHSA-2026:8871

https://access.redhat.com/errata/RHSA-2026:8870

https://access.redhat.com/errata/RHSA-2026:8869

https://access.redhat.com/errata/RHSA-2026:8863

https://access.redhat.com/errata/RHSA-2026:7682

https://access.redhat.com/errata/RHSA-2026:7678

https://access.redhat.com/errata/RHSA-2026:16174

https://access.redhat.com/errata/RHSA-2026:16030

https://access.redhat.com/errata/RHSA-2026:16009

https://access.redhat.com/errata/RHSA-2026:16008

https://access.redhat.com/errata/RHSA-2026:12341

https://access.redhat.com/errata/RHSA-2026:12340

https://access.redhat.com/errata/RHSA-2026:12339

https://access.redhat.com/errata/RHSA-2026:12338

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS