UBUNTU-CVE-2026-26981

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Source
https://ubuntu.com/security/CVE-2026-26981
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26981.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-26981
Upstream
Published
2026-02-24T03:16:00Z
Modified
2026-02-27T09:59:13Z
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. In versions 3.3.0 through 3.3.6 and 3.4.0 through 3.4.4, a heap-buffer-overflow (OOB read) occurs in the istream_nonparallel_read function in ImfContextInit.cpp when parsing a malformed EXR file through a memory-mapped IStream. A signed integer subtraction produces a negative value that is implicitly converted to size_t, resulting in a massive length being passed to memcpy. Versions 3.3.7 and 3.4.5 contain a patch.

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": "libopenexr-dev"
        },
        {
            "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-2026-26981.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": "libopenexr-dev"
        },
        {
            "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-2026-26981.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": "libopenexr-dev"
        },
        {
            "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-2026-26981.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": "libopenexr-dev"
        },
        {
            "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-2026-26981.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": "libopenexr-dev"
        },
        {
            "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-2026-26981.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": "libopenexr-dev"
        },
        {
            "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-2026-26981.json"