========================================================================== Ubuntu Security Notice USN-8259-1 May 07, 2026
openexr vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in OpenEXR.
Software Description:
- 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 26.04 LTS
libopenexr-3-1-30 3.1.13-2ubuntu0.26.04.1~esm1
Available with Ubuntu Pro
openexr 3.1.13-2ubuntu0.26.04.1~esm1
Available with Ubuntu Pro
Ubuntu 24.04 LTS
libopenexr-3-1-30 3.1.5-5.1ubuntu0.1~esm1
Available with Ubuntu Pro
openexr 3.1.5-5.1ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 22.04 LTS
libopenexr25 2.5.7-1ubuntu0.1~esm2
Available with Ubuntu Pro
openexr 2.5.7-1ubuntu0.1~esm2
Available with Ubuntu Pro
Ubuntu 20.04 LTS
libopenexr24 2.3.0-6ubuntu0.5+esm2
Available with Ubuntu Pro
openexr 2.3.0-6ubuntu0.5+esm2
Available with Ubuntu Pro
Ubuntu 18.04 LTS
libopenexr22 2.2.0-11.1ubuntu1.9+esm1
Available with Ubuntu Pro
openexr 2.2.0-11.1ubuntu1.9+esm1
Available with Ubuntu Pro
Ubuntu 16.04 LTS
libopenexr22 2.2.0-10ubuntu2.6+esm4
Available with Ubuntu Pro
openexr 2.2.0-10ubuntu2.6+esm4
Available with Ubuntu Pro
In general, a standard system update will make all the necessary
changes.
References:
https://ubuntu.com/security/notices/USN-8259-1
CVE-2026-27622, CVE-2026-34380, CVE-2026-34588
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