Heap-based Buffer Overflow Affecting openexr package, versions <3.4.14-0.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-OPENEXR-19270079
- published26 Aug 2026
- disclosed25 Aug 2026
Introduced: 25 Aug 2026
NewCVE-2026-59187 (opens in a new tab)How to fix?
Upgrade Debian:unstable openexr to version 3.4.14-0.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openexr package and not the openexr package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. OpenEXR versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.13 are vulnerable to a heap out-of-bounds write when exrmetrics reads a crafted deep scanline EXR. This occurs with pixel conversion options such as --pixelmode float or --bench because DeepSlice requests FLOAT output while the backing sample buffers are allocated using the input HALF element size. The issue is fixed in versions 3.3.13 and 3.4.14.
References
- https://security-tracker.debian.org/tracker/CVE-2026-59187
- https://github.com/AcademySoftwareFoundation/openexr/commit/46e70220dc91dbc1341fac4671704e970b450585
- https://github.com/AcademySoftwareFoundation/openexr/commit/7e772dd704b9b5d6dc2564647d89f7813f608e94
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-6jj8-cxcr-j8hm