UBUNTU-CVE-2026-47667

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Source
https://ubuntu.com/security/CVE-2026-47667
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47667.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-47667
Upstream
Published
2026-07-21T20:17:00Z
Modified
2026-07-29T10:18:35Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

CImg Library is a C++ library for image processing. Prior to version 4.0.0 in _load_analyze(), the header_size field is read as an unsigned int from the first 4 bytes of an Analyze/NIfTI file and passed directly to new unsigned char[header_size] without being bounded against the actual file size. A value up to ~4 GB is accepted. If the subsequent fread returns short as it will for any malformed file), the function throws a CImgIOException and the allocated buffer is never freed. A 6-byte crafted file is sufficient to trigger an allocation of ~1.3 GB per call, with the full allocation leaked on every error path. The issue is reachable via load_analyze() and the generic load() when the file extension is .hdr, .img, or .nii. Version 4.0.0 fixes the issue.

References

Affected packages

Ubuntu:16.04:LTS
cimg

Package

Name
cimg
Purl
pkg:deb/ubuntu/cimg?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.6.4+dfsg-1build1
1.6.5+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cimg-examples",
            "binary_version": "1.6.5+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47667.json"
Ubuntu:20.04:LTS
cimg

Package

Name
cimg
Purl
pkg:deb/ubuntu/cimg?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*
2.4.5+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cimg-examples",
            "binary_version": "2.4.5+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47667.json"
Ubuntu:26.04:LTS
cimg

Package

Name
cimg
Purl
pkg:deb/ubuntu/cimg?arch=source&distro=resolute

Affected ranges

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

Affected versions

3.*
3.5.2+dfsg-1
3.5.2+dfsg-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cimg-examples",
            "binary_version": "3.5.2+dfsg-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47667.json"
Ubuntu:Pro:18.04:LTS
cimg

Package

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

Affected ranges

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

Affected versions

1.*
1.7.9+dfsg-2
1.7.9+dfsg-2build1
1.7.9+dfsg-2ubuntu0.18.04.1
1.7.9+dfsg-2ubuntu0.18.04.2
1.7.9+dfsg-2ubuntu0.18.04.2+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cimg-examples",
            "binary_version": "1.7.9+dfsg-2ubuntu0.18.04.2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47667.json"
Ubuntu:Pro:22.04:LTS
cimg

Package

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

Affected ranges

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

Affected versions

2.*
2.9.4+dfsg-2
2.9.4+dfsg-3
2.9.4+dfsg-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cimg-examples",
            "binary_version": "2.9.4+dfsg-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47667.json"
Ubuntu:Pro:24.04:LTS
cimg

Package

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

Affected ranges

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

Affected versions

3.*
3.2.1+dfsg-1
3.2.1+dfsg-1ubuntu0.24.04.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cimg-examples",
            "binary_version": "3.2.1+dfsg-1ubuntu0.24.04.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47667.json"