USN-8193-2

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Source
https://ubuntu.com/security/notices/USN-8193-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8193-2.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8193-2
Upstream
Related
Published
2026-06-23T19:09:47Z
Modified
2026-06-24T02:29:23.423232622Z
Summary
libcap2 vulnerability
Details

USN-8193-1 fixed a vulnerability in libcap. This update provides the corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.

Original advisory details:

Ali Raza discovered that libcap incorrectly handled file capability updates. A local attacker could possibly use this issue to inject or strip capabilities into arbitrary executables and escalate privileges.

References

Affected packages

Ubuntu:Pro:14.04:LTS / libcap2

Package

Name
libcap2
Purl
pkg:deb/ubuntu/libcap2?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:2.24-0ubuntu2+esm2

Affected versions

1:2.*
1:2.22-1.2ubuntu2
1:2.24-0ubuntu1
1:2.24-0ubuntu2
1:2.24-0ubuntu2+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libcap2",
            "binary_version": "1:2.24-0ubuntu2+esm2"
        },
        {
            "binary_name": "libcap2-bin",
            "binary_version": "1:2.24-0ubuntu2+esm2"
        },
        {
            "binary_name": "libpam-cap",
            "binary_version": "1:2.24-0ubuntu2+esm2"
        }
    ],
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8193-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:14.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-4878",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:Pro:16.04:LTS / libcap2

Package

Name
libcap2
Purl
pkg:deb/ubuntu/libcap2?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:2.24-12ubuntu0.1~esm2

Affected versions

1:2.*
1:2.24-9
1:2.24-12
1:2.24-12ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libcap2",
            "binary_version": "1:2.24-12ubuntu0.1~esm2"
        },
        {
            "binary_name": "libcap2-bin",
            "binary_version": "1:2.24-12ubuntu0.1~esm2"
        },
        {
            "binary_name": "libpam-cap",
            "binary_version": "1:2.24-12ubuntu0.1~esm2"
        }
    ],
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8193-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-4878",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:Pro:18.04:LTS / libcap2

Package

Name
libcap2
Purl
pkg:deb/ubuntu/libcap2?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:2.25-1.2ubuntu0.1~esm2

Affected versions

1:2.*
1:2.25-1.1
1:2.25-1.2
1:2.25-1.2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libcap2",
            "binary_version": "1:2.25-1.2ubuntu0.1~esm2"
        },
        {
            "binary_name": "libcap2-bin",
            "binary_version": "1:2.25-1.2ubuntu0.1~esm2"
        },
        {
            "binary_name": "libpam-cap",
            "binary_version": "1:2.25-1.2ubuntu0.1~esm2"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8193-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:18.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-4878",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:Pro:20.04:LTS / libcap2

Package

Name
libcap2
Purl
pkg:deb/ubuntu/libcap2?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:2.32-1ubuntu0.2+esm1

Affected versions

1:2.*
1:2.25-2
1:2.27-1
1:2.32-1
1:2.32-1ubuntu0.1
1:2.32-1ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libcap2",
            "binary_version": "1:2.32-1ubuntu0.2+esm1"
        },
        {
            "binary_name": "libcap2-bin",
            "binary_version": "1:2.32-1ubuntu0.2+esm1"
        },
        {
            "binary_name": "libpam-cap",
            "binary_version": "1:2.32-1ubuntu0.2+esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8193-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-4878",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}