# CVE-2026-27622

## Summary

- **CVE ID:** CVE-2026-27622
- **Severity:** HIGH
- **CVSS Score:** 8.4 (CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-787
- **Published:** Mar 3, 2026
- **Last Modified:** Sep 14, 2026

## 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.

## Affected Products

- AcademySoftwareFoundation — openexr (>= 2.3.0, < 3.2.6)
- AcademySoftwareFoundation — openexr (>= 3.3.0, < 3.3.8)
- AcademySoftwareFoundation — openexr (>= 3.4.0, < 3.4.6)

## References

- [CNA](https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-cr4v-6jm6-4963)
- [redhat-SADP](https://access.redhat.com/security/cve/CVE-2026-27622)
- [redhat-SADP](https://bugzilla.redhat.com/show_bug.cgi?id=2444251)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27622.json)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:7678)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:7682)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:8863)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:12340)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:12341)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:12339)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:12338)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:8870)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:8869)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:8871)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:8872)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:8888)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:16008)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:16030)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:16009)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:16174)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.20%
- **EPSS Percentile:** 10.2

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._