UBUNTU-CVE-2026-34378

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Source

https://ubuntu.com/security/CVE-2026-34378

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34378.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-34378

Upstream

CVE-2026-34378

Withdrawn

2026-05-07T12:28:07Z

Published

2026-04-06T16:16:00Z

Modified

2026-05-07T14:01:41.051782Z

Severity

6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.

References

Affected packages

Ubuntu:18.04:LTS

openexr

Package

Name: openexr
Purl: pkg:deb/ubuntu/openexr@2.2.0-11.1ubuntu1.9?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.0-11ubuntu1

2.2.0-11.1ubuntu1

2.2.0-11.1ubuntu1.1

2.2.0-11.1ubuntu1.2

2.2.0-11.1ubuntu1.3

2.2.0-11.1ubuntu1.4

2.2.0-11.1ubuntu1.6

2.2.0-11.1ubuntu1.7

2.2.0-11.1ubuntu1.8

2.2.0-11.1ubuntu1.9

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libopenexr22",
            "binary_version": "2.2.0-11.1ubuntu1.9"
        },
        {
            "binary_name": "openexr",
            "binary_version": "2.2.0-11.1ubuntu1.9"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34378.json"

Ubuntu:24.04:LTS

openexr

Package

Name: openexr
Purl: pkg:deb/ubuntu/openexr@3.1.5-5.1build3?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.1.5-5.1

3.1.5-5.1build1

3.1.5-5.1build2

3.1.5-5.1build3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libopenexr-3-1-30",
            "binary_version": "3.1.5-5.1build3"
        },
        {
            "binary_name": "openexr",
            "binary_version": "3.1.5-5.1build3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34378.json"

Ubuntu:25.10

openexr

Package

Name: openexr
Purl: pkg:deb/ubuntu/openexr@3.1.13-2?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.1.13-2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libopenexr-3-1-30",
            "binary_version": "3.1.13-2"
        },
        {
            "binary_name": "openexr",
            "binary_version": "3.1.13-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34378.json"

Ubuntu:26.04

openexr

Package

Name: openexr
Purl: pkg:deb/ubuntu/openexr@3.1.13-2build1?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.1.13-2

3.1.13-2build1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libopenexr-3-1-30",
            "binary_version": "3.1.13-2build1"
        },
        {
            "binary_name": "openexr",
            "binary_version": "3.1.13-2build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34378.json"

Ubuntu:Pro:16.04:LTS

openexr

Package

Name: openexr
Purl: pkg:deb/ubuntu/openexr@2.2.0-10ubuntu2.6+esm3?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.0-1ubuntu3

2.2.0-7ubuntu1

2.2.0-9ubuntu1

2.2.0-10ubuntu2

2.2.0-10ubuntu2.1

2.2.0-10ubuntu2.2

2.2.0-10ubuntu2.3

2.2.0-10ubuntu2.4

2.2.0-10ubuntu2.6

2.2.0-10ubuntu2.6+esm1

2.2.0-10ubuntu2.6+esm2

2.2.0-10ubuntu2.6+esm3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libopenexr22",
            "binary_version": "2.2.0-10ubuntu2.6+esm3"
        },
        {
            "binary_name": "openexr",
            "binary_version": "2.2.0-10ubuntu2.6+esm3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34378.json"

Ubuntu:Pro:20.04:LTS

openexr

Package

Name: openexr
Purl: pkg:deb/ubuntu/openexr@2.3.0-6ubuntu0.5+esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.1-4.1ubuntu1

2.3.0-6

2.3.0-6build1

2.3.0-6ubuntu0.1

2.3.0-6ubuntu0.2

2.3.0-6ubuntu0.3

2.3.0-6ubuntu0.5

2.3.0-6ubuntu0.5+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libopenexr24",
            "binary_version": "2.3.0-6ubuntu0.5+esm1"
        },
        {
            "binary_name": "openexr",
            "binary_version": "2.3.0-6ubuntu0.5+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34378.json"

Ubuntu:Pro:22.04:LTS

openexr

Package

Name: openexr
Purl: pkg:deb/ubuntu/openexr@2.5.7-1ubuntu0.1~esm1?arch=source&distro=esm-apps/jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.5.4-2

2.5.7-1

2.5.7-1ubuntu0.1~esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libopenexr25",
            "binary_version": "2.5.7-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "openexr",
            "binary_version": "2.5.7-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34378.json"