# CVE-2026-55059: openexr: OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture... CVE-2026-55059 is fixed in 13 products on 1 platform, first by SUSE-SU-2026:22653-1, released July 14, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-55059 - Priority: Routine - CVSS: 6.1 (medium) - EPSS: 0.0015 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jul 14, 2026 ## Description OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. Versions prior to 3.2.10, 3.3.12 and 3.4.13 contain a heap out-of-bounds write in Imf_4_0::SampleCountChannel::set(int r, unsigned int newNumSamples[]). The row-based sample-count setter computes the target Y coordinate with dataWindow.min.x instead of dataWindow.min.y. For a valid deep image data window where min.x != min.y, a valid row index can be translated into an invalid Y coordinate, causing writes before the allocated _numSamples buffer. The vulnerability is reachable through the public OpenEXRUtil DeepImage API and can lead to heap corruption and process crashes. This issue has been fixed in versions 3.2.10, 3.3.12 and 3.4.13. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | mingw-openexr Fedora 43 | 3.3.14-1.fc43 | [FEDORA-2026-BCC9AC580D](https://patchblox.com/security/data/fix/linux/fedora-2026-bcc9ac580d.md) | Aug 25, 2026 | | Linux | mingw32-openexr Fedora 43 | 3.3.14-1.fc43 | [FEDORA-2026-BCC9AC580D](https://patchblox.com/security/data/fix/linux/fedora-2026-bcc9ac580d.md) | Aug 25, 2026 | | Linux | mingw32-openexr-debuginfo Fedora 43 | 3.3.14-1.fc43 | [FEDORA-2026-BCC9AC580D](https://patchblox.com/security/data/fix/linux/fedora-2026-bcc9ac580d.md) | Aug 25, 2026 | | Linux | mingw32-openexr-tools Fedora 43 | 3.3.14-1.fc43 | [FEDORA-2026-BCC9AC580D](https://patchblox.com/security/data/fix/linux/fedora-2026-bcc9ac580d.md) | Aug 25, 2026 | | Linux | mingw64-openexr Fedora 43 | 3.3.14-1.fc43 | [FEDORA-2026-BCC9AC580D](https://patchblox.com/security/data/fix/linux/fedora-2026-bcc9ac580d.md) | Aug 25, 2026 | | Linux | mingw64-openexr-debuginfo Fedora 43 | 3.3.14-1.fc43 | [FEDORA-2026-BCC9AC580D](https://patchblox.com/security/data/fix/linux/fedora-2026-bcc9ac580d.md) | Aug 25, 2026 | | Linux | mingw64-openexr-tools Fedora 43 | 3.3.14-1.fc43 | [FEDORA-2026-BCC9AC580D](https://patchblox.com/security/data/fix/linux/fedora-2026-bcc9ac580d.md) | Aug 25, 2026 | | Linux | openexr Debian 14 | 3.4.14-0.1 | [DEBIAN-CVE-2026-55059](https://patchblox.com/security/data/fix/linux/debian-cve-2026-55059.md) | Aug 28, 2026 | | Linux | openexr amzn 2023 | 3.1.5-1.amzn2023.0.12 | [ALAS2023-2026-2154](https://patchblox.com/security/data/fix/linux/alas2023-2026-2154.md) | Sep 14, 2026 | | Linux | openexr opensuse-leap 16.0 | 3.2.2-160000.9.1 | [OPENSUSE-SU-2026:21336-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21336-1.md) | Jul 14, 2026 | | Linux | openexr sles 15.7 | 2.2.1-150000.3.52.1 | [SUSE-SU-2026:3169-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3169-1.md) | Jul 21, 2026 | | Linux | openexr sles 16.0 | 3.2.2-160000.9.1 | [SUSE-SU-2026:22653-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22653-1.md) | Jul 14, 2026 | | Linux | openexr-debuginfo amzn 2023 | 3.1.5-1.amzn2023.0.12 | [ALAS2023-2026-2154](https://patchblox.com/security/data/fix/linux/alas2023-2026-2154.md) | Sep 14, 2026 | | Linux | openexr-debugsource amzn 2023 | 3.1.5-1.amzn2023.0.12 | [ALAS2023-2026-2154](https://patchblox.com/security/data/fix/linux/alas2023-2026-2154.md) | Sep 14, 2026 | | Linux | openexr-devel amzn 2023 | 3.1.5-1.amzn2023.0.12 | [ALAS2023-2026-2154](https://patchblox.com/security/data/fix/linux/alas2023-2026-2154.md) | Sep 14, 2026 | | Linux | openexr-libs amzn 2023 | 3.1.5-1.amzn2023.0.12 | [ALAS2023-2026-2154](https://patchblox.com/security/data/fix/linux/alas2023-2026-2154.md) | Sep 14, 2026 | | Linux | openexr-libs-debuginfo amzn 2023 | 3.1.5-1.amzn2023.0.12 | [ALAS2023-2026-2154](https://patchblox.com/security/data/fix/linux/alas2023-2026-2154.md) | Sep 14, 2026 | --- Data as of 2026-11-10T07:50:38Z UTC. 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