ESB-2026.4830

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4830 USN-8259-1: OpenEXR vulnerabilities 8 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: OpenEXR Publisher: Ubuntu Operating System: Ubuntu Resolution: Patch/Upgrade CVE Names: CVE-2026-34380 CVE-2026-27622 CVE-2026-34588 Original Bulletin: https://ubuntu.com/security/notices/USN-8259-1 Comment: CVSS (Max): 7.8 CVE-2026-34588 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVSS Source: Ubuntu, [NIST] Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H EPSS (Max): 0.0% (14th) CVE-2026-34380 2026-05-07 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-8259-1: OpenEXR vulnerabilities Publication date 7 May 2026 Overview Several security issues were fixed in OpenEXR. Releases 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS 16.04 LTS --------------------------------------------------------------------------------- Open side navigation Packages o openexr - tools for the OpenEXR image format Details Quang Luong discovered that OpenEXR incorrectly handled sample count accumulation when processing deep scan line image files. An attacker could possibly use this issue to cause OpenEXR to crash, resulting in a denial of service, or execute arbitrary code. ( CVE-2026-27622 ) It was discovered that OpenEXR had an integer overflow in the PXR24 decoder. An attacker could possibly use this issue to cause OpenEXR to crash, resulting in a denial of service, or execute arbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. ( CVE-2026-34380 ) Quang Luong discovered that OpenEXR had a signed integer overflow in the PIZ decoder. An attacker could possibly use this issue to cause OpenEXR to crash, resulting in a denial of service, or execute arbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. ( CVE-2026-34588 ) --------------------------------------------------------------------------------- Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu Package Version Release libopenexr-3-1-30 - 3.1.13-2ubuntu0.26.04.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become 26.04 LTS publicly available in the future. resolute openexr - 3.1.13-2ubuntu0.26.04.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. libopenexr-3-1-30 - 3.1.5-5.1ubuntu0.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly 24.04 LTS available in the future. noble openexr - 3.1.5-5.1ubuntu0.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. libopenexr25 - 2.5.7-1ubuntu0.1~esm2 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly 22.04 LTS available in the future. jammy openexr - 2.5.7-1ubuntu0.1~esm2 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. libopenexr24 - 2.3.0-6ubuntu0.5+esm2 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly 20.04 LTS available in the future. focal openexr - 2.3.0-6ubuntu0.5+esm2 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. libopenexr22 - 2.2.0-11.1ubuntu1.9+esm1 Ubuntu Pro Fix available 18.04 LTS with Ubuntu Pro . bionic openexr - 2.2.0-11.1ubuntu1.9+esm1 Ubuntu Pro Fix available with Ubuntu Pro . libopenexr22 - 2.2.0-10ubuntu2.6+esm4 Ubuntu Pro Fix available with 16.04 LTS Ubuntu Pro . xenial openexr - 2.2.0-10ubuntu2.6+esm4 Ubuntu Pro Fix available with Ubuntu Pro . --------------------------------------------------------------------------------- References o CVE-2026-34588 o CVE-2026-34380 o CVE-2026-27622 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. 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