USN-8581-1

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Source
https://ubuntu.com/security/notices/USN-8581-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8581-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8581-1
Upstream
CVE (3)
Related
UBUNTU (3)
Published
2026-07-21T17:34:42Z
Modified
2026-07-23T01:29:27Z
Summary
libarchive vulnerabilities
Details

It was discovered that libarchive did not properly manage memory when unpacking certain RAR5 archives, leading to a double free. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-14164)

It was discovered that libarchive did not properly validate certain tar archives, leading to a buffer overflow. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-15028)

It was discovered that libarchive did not properly validate certain malformed ACL entries. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-5745)

References

Affected packages

Ubuntu:Pro:20.04:LTS / libarchive

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.4.0-2ubuntu1.5+esm3

Affected versions

3.*
3.4.0-1
3.4.0-1build1
3.4.0-1ubuntu2
3.4.0-2ubuntu1
3.4.0-2ubuntu1.1
3.4.0-2ubuntu1.2
3.4.0-2ubuntu1.3
3.4.0-2ubuntu1.4
3.4.0-2ubuntu1.5
3.4.0-2ubuntu1.5+esm1
3.4.0-2ubuntu1.5+esm2

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libarchive-tools",
            "binary_version":  "3.4.0-2ubuntu1.5+esm3"
        },
        {
            "binary_name":  "libarchive13",
            "binary_version":  "3.4.0-2ubuntu1.5+esm3"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-5745",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-14164",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8581-1.json"

Ubuntu:22.04:LTS / libarchive

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.0-1ubuntu1.8

Affected versions

3.*
3.4.3-2
3.4.3-2build1
3.5.2-1
3.5.2-1ubuntu1
3.6.0-1ubuntu1
3.6.0-1ubuntu1.1
3.6.0-1ubuntu1.2
3.6.0-1ubuntu1.3
3.6.0-1ubuntu1.4
3.6.0-1ubuntu1.5
3.6.0-1ubuntu1.6
3.6.0-1ubuntu1.7

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libarchive-tools",
            "binary_version":  "3.6.0-1ubuntu1.8"
        },
        {
            "binary_name":  "libarchive13",
            "binary_version":  "3.6.0-1ubuntu1.8"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-5745",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-14164",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8581-1.json"

Ubuntu:24.04:LTS / libarchive

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.7.2-2ubuntu0.8

Affected versions

3.*
3.6.2-1ubuntu1
3.7.2-1ubuntu1
3.7.2-1ubuntu2
3.7.2-1.1ubuntu2
3.7.2-2
3.7.2-2ubuntu0.1
3.7.2-2ubuntu0.2
3.7.2-2ubuntu0.3
3.7.2-2ubuntu0.4
3.7.2-2ubuntu0.5
3.7.2-2ubuntu0.6
3.7.2-2ubuntu0.7

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libarchive-tools",
            "binary_version":  "3.7.2-2ubuntu0.8"
        },
        {
            "binary_name":  "libarchive13t64",
            "binary_version":  "3.7.2-2ubuntu0.8"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-5745",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-14164",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8581-1.json"

Ubuntu:26.04:LTS / libarchive

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.8.5-1ubuntu2.2

Affected versions

3.*
3.7.7-0ubuntu3
3.8.5-1ubuntu1
3.8.5-1ubuntu2
3.8.5-1ubuntu2.1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libarchive-tools",
            "binary_version":  "3.8.5-1ubuntu2.2"
        },
        {
            "binary_name":  "libarchive13t64",
            "binary_version":  "3.8.5-1ubuntu2.2"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-5745",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-14164",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-15028",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8581-1.json"