UBUNTU-CVE-2025-48172

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Source
https://ubuntu.com/security/CVE-2025-48172
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48172.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-48172
Upstream
Published
2025-07-04T13:15:00Z
Modified
2026-05-20T16:23:31Z
Severity
  • 5.6 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

CHMLib through 2bef8d0, as used in SumatraPDF and other products, has a chm_lib.c _chm_decompress_block integer overflow. There is a resultant heap-based buffer overflow in _chm_fetch_bytes.

References

Affected packages

Ubuntu:16.04:LTS
chmlib

Package

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

Affected ranges

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

Affected versions

2:0.*
2:0.40a-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libchm-bin",
            "binary_version": "2:0.40a-3"
        },
        {
            "binary_name": "libchm1",
            "binary_version": "2:0.40a-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48172.json"
Ubuntu:18.04:LTS
chmlib

Package

Name
chmlib
Purl
pkg:deb/ubuntu/chmlib?arch=source&distro=bionic

Affected ranges

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

Affected versions

2:0.*
2:0.40a-3
2:0.40a-4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libchm-bin",
            "binary_version": "2:0.40a-4"
        },
        {
            "binary_name": "libchm1",
            "binary_version": "2:0.40a-4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48172.json"
Ubuntu:20.04:LTS
chmlib

Package

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

Affected ranges

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

Affected versions

2:0.*
2:0.40a-5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libchm-bin",
            "binary_version": "2:0.40a-5"
        },
        {
            "binary_name": "libchm1",
            "binary_version": "2:0.40a-5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48172.json"
Ubuntu:22.04:LTS
chmlib

Package

Name
chmlib
Purl
pkg:deb/ubuntu/chmlib?arch=source&distro=jammy

Affected ranges

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

Affected versions

2:0.*
2:0.40a-7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libchm-bin",
            "binary_version": "2:0.40a-7"
        },
        {
            "binary_name": "libchm1",
            "binary_version": "2:0.40a-7"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48172.json"
Ubuntu:24.04:LTS
chmlib

Package

Name
chmlib
Purl
pkg:deb/ubuntu/chmlib?arch=source&distro=noble

Affected ranges

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

Affected versions

2:0.*
2:0.40a-8

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libchm-bin",
            "binary_version": "2:0.40a-8"
        },
        {
            "binary_name": "libchm1",
            "binary_version": "2:0.40a-8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48172.json"
Ubuntu:25.10
chmlib

Package

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

Affected ranges

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

Affected versions

2:0.*
2:0.40a-8.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libchm-bin",
            "binary_version": "2:0.40a-8.1"
        },
        {
            "binary_name": "libchm1",
            "binary_version": "2:0.40a-8.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48172.json"
Ubuntu:26.04:LTS
chmlib

Package

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

Affected ranges

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

Affected versions

2:0.*
2:0.40a-8.1
2:0.40a-9

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libchm-bin",
            "binary_version": "2:0.40a-9"
        },
        {
            "binary_name": "libchm1",
            "binary_version": "2:0.40a-9"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48172.json"