UBUNTU-CVE-2026-44663

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Source
https://ubuntu.com/security/CVE-2026-44663
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44663.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-44663
Upstream
Published
2026-06-18T21:16:00Z
Modified
2026-06-29T13:50:24Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H CVSS Calculator
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions 3.4.0 through 3.4.11, an integer overflow in ht_undo_impl() in src/lib/OpenEXRCore/internal_ht.cpp leads to a heap-buffer overflow when decoding a crafted HTJ2K-compressed EXR file. decode->channels[i].width (int32_t) is multiplied by bytes_per_element in 32-bit signed arithmetic. With large widths (e.g., >= 536870912 for FLOAT data), this overflows, producing a corrupted offset that is later used for pointer arithmetic and can cause a heap out-of-bounds write. The same unchecked multiplication pattern appears in two other HTJ2K paths (bytes-per-line accumulation and pixel-line pointer advancement). As with related CVE-2026-34378 through CVE-2026-34589 fixes in other codecs, validating only after the multiplication is too late because the value may already be overflowed. This issue has been fixed in version 3.4.12.

References

Affected packages

Ubuntu:25.10
openexr

Package

Name
openexr
Purl
pkg:deb/ubuntu/openexr?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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-2026-44663.json"
Ubuntu:Pro:16.04:LTS
openexr

Package

Name
openexr
Purl
pkg:deb/ubuntu/openexr?arch=source&distro=esm-infra%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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
2.2.0-10ubuntu2.6+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopenexr22",
            "binary_version": "2.2.0-10ubuntu2.6+esm4"
        },
        {
            "binary_name": "openexr",
            "binary_version": "2.2.0-10ubuntu2.6+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44663.json"
Ubuntu:Pro:18.04:LTS
openexr

Package

Name
openexr
Purl
pkg:deb/ubuntu/openexr?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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
2.2.0-11.1ubuntu1.9+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopenexr22",
            "binary_version": "2.2.0-11.1ubuntu1.9+esm1"
        },
        {
            "binary_name": "openexr",
            "binary_version": "2.2.0-11.1ubuntu1.9+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44663.json"
Ubuntu:Pro:20.04:LTS
openexr

Package

Name
openexr
Purl
pkg:deb/ubuntu/openexr?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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
2.3.0-6ubuntu0.5+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopenexr24",
            "binary_version": "2.3.0-6ubuntu0.5+esm2"
        },
        {
            "binary_name": "openexr",
            "binary_version": "2.3.0-6ubuntu0.5+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44663.json"
Ubuntu:Pro:22.04:LTS
openexr

Package

Name
openexr
Purl
pkg:deb/ubuntu/openexr?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.5.4-2
2.5.7-1
2.5.7-1ubuntu0.1~esm1
2.5.7-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopenexr25",
            "binary_version": "2.5.7-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "openexr",
            "binary_version": "2.5.7-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44663.json"
Ubuntu:Pro:24.04:LTS
openexr

Package

Name
openexr
Purl
pkg:deb/ubuntu/openexr?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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
3.1.5-5.1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopenexr-3-1-30",
            "binary_version": "3.1.5-5.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "openexr",
            "binary_version": "3.1.5-5.1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44663.json"
Ubuntu:Pro:26.04:LTS
openexr

Package

Name
openexr
Purl
pkg:deb/ubuntu/openexr?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.13-2
3.1.13-2build1
3.1.13-2ubuntu0.26.04.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopenexr-3-1-30",
            "binary_version": "3.1.13-2ubuntu0.26.04.1~esm1"
        },
        {
            "binary_name": "openexr",
            "binary_version": "3.1.13-2ubuntu0.26.04.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44663.json"