UBUNTU-CVE-2026-34588

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Source
https://ubuntu.com/security/CVE-2026-34588
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34588.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-34588
Upstream
Downstream
Related
Published
2026-04-06T16:16:00Z
Modified
2026-05-08T13:55:21.100547Z
Severity
  • 8.6 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internalexrundo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.

References

Affected packages

Ubuntu:Pro:24.04:LTS / openexr

Package

Name
openexr
Purl
pkg:deb/ubuntu/openexr@3.1.5-5.1ubuntu0.1~esm1?arch=source&distro=esm-apps/noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.1.5-5.1ubuntu0.1~esm1

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 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "3.1.5-5.1ubuntu0.1~esm1",
            "binary_name": "libopenexr-3-1-30"
        },
        {
            "binary_version": "3.1.5-5.1ubuntu0.1~esm1",
            "binary_name": "openexr"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34588.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-2026-34588.json"

Ubuntu:Pro:26.04:LTS / openexr

Package

Name
openexr
Purl
pkg:deb/ubuntu/openexr@3.1.13-2ubuntu0.26.04.1~esm1?arch=source&distro=esm-apps/resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.1.13-2ubuntu0.26.04.1~esm1

Affected versions

3.*
3.1.13-2
3.1.13-2build1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "3.1.13-2ubuntu0.26.04.1~esm1",
            "binary_name": "libopenexr-3-1-30"
        },
        {
            "binary_version": "3.1.13-2ubuntu0.26.04.1~esm1",
            "binary_name": "openexr"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34588.json"