USN-8292-1

It was discovered that libarchive incorrectly handled certain RAR archives. An attacker could possibly use this issue to cause an out-of-bounds read via a crafted RAR archive, leading to sensitive memory disclosure. (CVE-2026-4424)

It was discovered that libarchive incorrectly handled certain ISO files. An attacker could possibly use this issue to cause incorrect memory allocation via a crafted ISO file, leading to a denial of service. (CVE-2026-4426)

It was discovered that libarchive incorrectly handled block pointer allocation in zisofs on 32-bit systems. An attacker could possibly use this issue to cause a heap buffer overflow via a crafted ISO9660 image, possibly leading to arbitrary code execution. (CVE-2026-5121)

References

Affected packages

Ubuntu:22.04:LTS

libarchive

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.6.0-1ubuntu1.7

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

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libarchive-tools",
            "binary_version": "3.6.0-1ubuntu1.7"
        },
        {
            "binary_name": "libarchive13",
            "binary_version": "3.6.0-1ubuntu1.7"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-4424",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-4426",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-5121",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "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-8292-1.json"

Ubuntu:24.04:LTS

libarchive

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.7.2-2ubuntu0.7

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

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libarchive-tools",
            "binary_version": "3.7.2-2ubuntu0.7"
        },
        {
            "binary_name": "libarchive13t64",
            "binary_version": "3.7.2-2ubuntu0.7"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-4424",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-4426",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-5121",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "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-8292-1.json"

Ubuntu:25.10

libarchive

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.7.7-0ubuntu3.2

Affected versions

3.*

3.7.7-0ubuntu2

3.7.7-0ubuntu2.1

3.7.7-0ubuntu2.2

3.7.7-0ubuntu3

3.7.7-0ubuntu3.1

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libarchive-tools",
            "binary_version": "3.7.7-0ubuntu3.2"
        },
        {
            "binary_name": "libarchive13t64",
            "binary_version": "3.7.7-0ubuntu3.2"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-4424",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-4426",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-5121",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:25.10"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8292-1.json"

Ubuntu:26.04:LTS

libarchive

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.8.5-1ubuntu2.1

Affected versions

3.*

3.7.7-0ubuntu3

3.8.5-1ubuntu1

3.8.5-1ubuntu2

Ecosystem specific

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

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8292-1.json"

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-4424",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-4426",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-5121",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:26.04:LTS"
}

Ubuntu:Pro:14.04:LTS

libarchive

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.1.2-7ubuntu2.8+esm5

Affected versions

3.*

3.1.2-5ubuntu1

3.1.2-7ubuntu1

3.1.2-7ubuntu2

3.1.2-7ubuntu2.1

3.1.2-7ubuntu2.2

3.1.2-7ubuntu2.3

3.1.2-7ubuntu2.4

3.1.2-7ubuntu2.6

3.1.2-7ubuntu2.7

3.1.2-7ubuntu2.8

3.1.2-7ubuntu2.8+esm1

3.1.2-7ubuntu2.8+esm3

3.1.2-7ubuntu2.8+esm4

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "bsdcpio",
            "binary_version": "3.1.2-7ubuntu2.8+esm5"
        },
        {
            "binary_name": "bsdtar",
            "binary_version": "3.1.2-7ubuntu2.8+esm5"
        },
        {
            "binary_name": "libarchive13",
            "binary_version": "3.1.2-7ubuntu2.8+esm5"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-4424",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-4426",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-5121",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:14.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8292-1.json"

Ubuntu:Pro:16.04:LTS

libarchive

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.1.2-11ubuntu0.16.04.8+esm3

Affected versions

3.*

3.1.2-11build1

3.1.2-11ubuntu0.16.04.1

3.1.2-11ubuntu0.16.04.2

3.1.2-11ubuntu0.16.04.3

3.1.2-11ubuntu0.16.04.4

3.1.2-11ubuntu0.16.04.5

3.1.2-11ubuntu0.16.04.6

3.1.2-11ubuntu0.16.04.7

3.1.2-11ubuntu0.16.04.8

3.1.2-11ubuntu0.16.04.8+esm1

3.1.2-11ubuntu0.16.04.8+esm2

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "bsdcpio",
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
        },
        {
            "binary_name": "bsdtar",
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
        },
        {
            "binary_name": "libarchive13",
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-4424",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-4426",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-5121",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:16.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8292-1.json"

Ubuntu:Pro:18.04:LTS

libarchive

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.2.2-3.1ubuntu0.7+esm3

Affected versions

3.*

3.2.2-3.1

3.2.2-3.1ubuntu0.1

3.2.2-3.1ubuntu0.2

3.2.2-3.1ubuntu0.3

3.2.2-3.1ubuntu0.4

3.2.2-3.1ubuntu0.5

3.2.2-3.1ubuntu0.6

3.2.2-3.1ubuntu0.7

3.2.2-3.1ubuntu0.7+esm1

3.2.2-3.1ubuntu0.7+esm2

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "bsdcpio",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
        },
        {
            "binary_name": "bsdtar",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
        },
        {
            "binary_name": "libarchive-tools",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
        },
        {
            "binary_name": "libarchive13",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-4424",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-4426",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-5121",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:18.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8292-1.json"

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

0Unknown introduced version / All previous versions are affected

Fixed

3.4.0-2ubuntu1.5+esm2

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

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+esm2"
        },
        {
            "binary_name": "libarchive13",
            "binary_version": "3.4.0-2ubuntu1.5+esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8292-1.json"

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-4424",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-4426",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-5121",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}