USN-8973-1

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Source
https://ubuntu.com/security/notices/USN-8973-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8973-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8973-1
Upstream
Related
Published
2026-11-03T14:42:47Z
Modified
2026-11-04T03:43:13Z
Summary
libmspack vulnerability
Details

It was discovered that libmspack did not properly initialize pointers when handling errors while reading KWAJ archive headers. An attacker could possibly use this issue to cause libmspack to crash, resulting in a denial of service, or execute arbitrary code.

References

Affected packages

Ubuntu:22.04:LTS / libmspack

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.10.1-2ubuntu0.1

Affected versions

0.*
0.10.1-2build1
0.10.1-2build2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libmspack0",
            "binary_version": "0.10.1-2ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-110602",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8973-1.json"

Ubuntu:24.04:LTS / libmspack

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.11-1.1ubuntu0.24.04.1

Affected versions

0.*
0.11-1
0.11-1.1
0.11-1.1build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libmspack0t64",
            "binary_version": "0.11-1.1ubuntu0.24.04.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-110602",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8973-1.json"

Ubuntu:26.10 / libmspack

Package

Name
libmspack
Purl
pkg:deb/ubuntu/libmspack?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.11-1.1ubuntu0.26.10.1

Affected versions

0.*
0.11-1.1build2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libmspack0t64",
            "binary_version": "0.11-1.1ubuntu0.26.10.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-110602",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:26.10"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8973-1.json"

Ubuntu:26.04:LTS / libmspack

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.11-1.1ubuntu0.26.04.1

Affected versions

0.*
0.11-1.1build1
0.11-1.1build2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libmspack0t64",
            "binary_version": "0.11-1.1ubuntu0.26.04.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-110602",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8973-1.json"