UBUNTU-CVE-2026-34379

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Source
https://ubuntu.com/security/CVE-2026-34379
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34379.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-34379
Upstream
Withdrawn
2026-05-07T12:28:07Z
Published
2026-04-06T16:16:00Z
Modified
2026-05-07T14:03:56.940526Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/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 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, a misaligned memory write vulnerability exists in LossyDctDecoderexecute() in src/lib/OpenEXRCore/internaldwadecoder.h:749. When decoding a DWA or DWAB-compressed EXR file containing a FLOAT-type channel, the decoder performs an in-place HALF→FLOAT conversion by casting an unaligned uint8t * row pointer to float * and writing through it. Because the row buffer may not be 4-byte aligned, this constitutes undefined behavior under the C standard and crashes immediately on architectures that enforce alignment (ARM, RISC-V, etc.). On x86 it is silently tolerated at runtime but remains exploitable via compiler optimizations that assume aligned access. This vulnerability is fixed in 3.2.7, 3.3.9, and 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_version": "2.2.0-11.1ubuntu1.9",
            "binary_name": "libopenexr22"
        },
        {
            "binary_version": "2.2.0-11.1ubuntu1.9",
            "binary_name": "openexr"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34379.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_version": "3.1.5-5.1build3",
            "binary_name": "libopenexr-3-1-30"
        },
        {
            "binary_version": "3.1.5-5.1build3",
            "binary_name": "openexr"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34379.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_version": "3.1.13-2",
            "binary_name": "libopenexr-3-1-30"
        },
        {
            "binary_version": "3.1.13-2",
            "binary_name": "openexr"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34379.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_version": "3.1.13-2build1",
            "binary_name": "libopenexr-3-1-30"
        },
        {
            "binary_version": "3.1.13-2build1",
            "binary_name": "openexr"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34379.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_version": "2.2.0-10ubuntu2.6+esm3",
            "binary_name": "libopenexr22"
        },
        {
            "binary_version": "2.2.0-10ubuntu2.6+esm3",
            "binary_name": "openexr"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34379.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_version": "2.3.0-6ubuntu0.5+esm1",
            "binary_name": "libopenexr24"
        },
        {
            "binary_version": "2.3.0-6ubuntu0.5+esm1",
            "binary_name": "openexr"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34379.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_version": "2.5.7-1ubuntu0.1~esm1",
            "binary_name": "libopenexr25"
        },
        {
            "binary_version": "2.5.7-1ubuntu0.1~esm1",
            "binary_name": "openexr"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34379.json"