# CVE-2026-42216: openexr: OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for t... CVE-2026-42216 is fixed in 6 products on 1 platform, first by RHSA-2026:39024, released May 7, 2026. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2026-42216 - Priority: Urgent - CVSS: 9.1 (critical) - EPSS: 0.0047 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: May 7, 2026 ## Description OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, IDManifest::init() reconstructs strings from a prefix-compressed representation. If the previous string is longer than 255 bytes, the next string is expected to begin with a 2-byte prefix length. The code reads stringList[i][0] and stringList[i][1] without checking that the current string has at least two bytes. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | openexr Debian 14 | 3.4.14-0.1 | [DEBIAN-CVE-2026-42216](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42216.md) | May 7, 2026 | | Linux | openexr RHEL 10 | 3.1.10-8.el10_0.3 | [RHSA-2026:39024](https://patchblox.com/security/data/fix/linux/rhsa-2026-39024.md) | May 7, 2026 | | Linux | openexr RHEL 9 | 0:3.1.1-3.el9_8.3 | [RHSA-2026:38498](https://patchblox.com/security/data/fix/linux/rhsa-2026-38498.md) | Jul 13, 2026 | | Linux | openexr almalinux 10 | 3.1.10-8.el10_2.3 | [ALSA-2026:38499](https://patchblox.com/security/data/fix/linux/alsa-2026-38499.md) | Jul 13, 2026 | | Linux | openexr almalinux 9 | 3.1.1-3.el9_8.3 | [ALSA-2026:38498](https://patchblox.com/security/data/fix/linux/alsa-2026-38498.md) | Jul 13, 2026 | | Linux | openexr amzn 2023 | 3.1.5-1.amzn2023.0.11 | [ALAS2023-2026-1713](https://patchblox.com/security/data/fix/linux/alas2023-2026-1713.md) | May 25, 2026 | | Linux | openexr ol 10 | 0:3.1.10-8.el10_2.3 | [ELSA-2026-38499](https://patchblox.com/security/data/fix/linux/elsa-2026-38499.md) | Jul 16, 2026 | | Linux | openexr ol 9 | 0:3.1.1-3.el9_8.3 | [ELSA-2026-38498](https://patchblox.com/security/data/fix/linux/elsa-2026-38498.md) | Jul 13, 2026 | | Linux | openexr rocky 10 | 0:3.1.10-8.el10_2.3 | [RLSA-2026:38499](https://patchblox.com/security/data/fix/linux/rlsa-2026-38499.md) | Jul 14, 2026 | | Linux | openexr rocky 9 | 0:3.1.1-3.el9_8.3 | [RLSA-2026:38498](https://patchblox.com/security/data/fix/linux/rlsa-2026-38498.md) | Jul 14, 2026 | | Linux | openexr-debuginfo amzn 2023 | 3.1.5-1.amzn2023.0.11 | [ALAS2023-2026-1713](https://patchblox.com/security/data/fix/linux/alas2023-2026-1713.md) | May 25, 2026 | | Linux | openexr-debugsource amzn 2023 | 3.1.5-1.amzn2023.0.11 | [ALAS2023-2026-1713](https://patchblox.com/security/data/fix/linux/alas2023-2026-1713.md) | May 25, 2026 | | Linux | openexr-devel RHEL 9 | 0:3.1.1-3.el9_8.3 | [RHSA-2026:38498](https://patchblox.com/security/data/fix/linux/rhsa-2026-38498.md) | Jul 13, 2026 | | Linux | openexr-devel almalinux 10 | 3.1.10-8.el10_2.3 | [ALSA-2026:38499](https://patchblox.com/security/data/fix/linux/alsa-2026-38499.md) | Jul 13, 2026 | | Linux | openexr-devel almalinux 9 | 3.1.1-3.el9_8.3 | [ALSA-2026:38498](https://patchblox.com/security/data/fix/linux/alsa-2026-38498.md) | Jul 13, 2026 | | Linux | openexr-devel amzn 2023 | 3.1.5-1.amzn2023.0.11 | [ALAS2023-2026-1713](https://patchblox.com/security/data/fix/linux/alas2023-2026-1713.md) | May 25, 2026 | | Linux | openexr-devel ol 10 | 0:3.1.10-8.el10_2.3 | [ELSA-2026-38499](https://patchblox.com/security/data/fix/linux/elsa-2026-38499.md) | Jul 16, 2026 | | Linux | openexr-devel ol 9 | 0:3.1.1-3.el9_8.3 | [ELSA-2026-38498](https://patchblox.com/security/data/fix/linux/elsa-2026-38498.md) | Jul 13, 2026 | | Linux | openexr-libs RHEL 9 | 0:3.1.1-3.el9_8.3 | [RHSA-2026:38498](https://patchblox.com/security/data/fix/linux/rhsa-2026-38498.md) | Jul 13, 2026 | | Linux | openexr-libs almalinux 10 | 3.1.10-8.el10_2.3 | [ALSA-2026:38499](https://patchblox.com/security/data/fix/linux/alsa-2026-38499.md) | Jul 13, 2026 | | Linux | openexr-libs almalinux 9 | 3.1.1-3.el9_8.3 | [ALSA-2026:38498](https://patchblox.com/security/data/fix/linux/alsa-2026-38498.md) | Jul 13, 2026 | | Linux | openexr-libs amzn 2023 | 3.1.5-1.amzn2023.0.11 | [ALAS2023-2026-1713](https://patchblox.com/security/data/fix/linux/alas2023-2026-1713.md) | May 25, 2026 | | Linux | openexr-libs ol 10 | 0:3.1.10-8.el10_2.3 | [ELSA-2026-38499](https://patchblox.com/security/data/fix/linux/elsa-2026-38499.md) | Jul 16, 2026 | | Linux | openexr-libs ol 9 | 0:3.1.1-3.el9_8.3 | [ELSA-2026-38498](https://patchblox.com/security/data/fix/linux/elsa-2026-38498.md) | Jul 13, 2026 | | Linux | openexr-libs-debuginfo amzn 2023 | 3.1.5-1.amzn2023.0.11 | [ALAS2023-2026-1713](https://patchblox.com/security/data/fix/linux/alas2023-2026-1713.md) | May 25, 2026 | --- Data as of 2026-11-08T19:12:23Z UTC. 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