USN-8925-1

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Source
https://ubuntu.com/security/notices/USN-8925-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8925-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8925-1
Upstream
CVE (3)
Related
UBUNTU (3)
Published
2026-10-14T03:31:33Z
Modified
2026-10-14T11:57:58Z
Summary
libyaml-perl vulnerabilities
Details

Dominique Dumont discovered that YAML-LibYAML did not correctly handle certain reflection operations. If a user or system were tricked into opening a specially crafted file, an attacker could possibly use this issue to delete files. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2017-20285)

It was discovered that YAML-LibYAML did not correctly handle parsing certain documents. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-25777)

It was discovered that YAML-LibYAML contained a regular expression susceptible to catastrophic backtracking. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service. (CVE-2026-63676)

References

Affected packages

Ubuntu:22.04:LTS
libyaml-perl

Package

Name
libyaml-perl
Purl
pkg:deb/ubuntu/libyaml-perl?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.30-1ubuntu0.22.04.1

Affected versions

1.*
1.30-1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libyaml-perl",
            "binary_version":  "1.30-1ubuntu0.22.04.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-63676",
            "severity":  [
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8925-1.json"
Ubuntu:24.04:LTS
libyaml-perl

Package

Name
libyaml-perl
Purl
pkg:deb/ubuntu/libyaml-perl?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.31-1ubuntu0.24.04.1

Affected versions

1.*
1.30-2
1.31-1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libyaml-perl",
            "binary_version":  "1.31-1ubuntu0.24.04.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-63676",
            "severity":  [
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8925-1.json"
Ubuntu:Pro:16.04:LTS
libyaml-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.15-1ubuntu0.1~esm1

Affected versions

1.*
1.13-1
1.15-1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libyaml-perl",
            "binary_version":  "1.15-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2017-20285",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2019-25777",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-63676",
            "severity":  [
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:Pro:16.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8925-1.json"
Ubuntu:Pro:18.04:LTS
libyaml-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.24-1ubuntu0.1~esm1

Affected versions

1.*
1.21-1
1.24-1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libyaml-perl",
            "binary_version":  "1.24-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2017-20285",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2019-25777",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-63676",
            "severity":  [
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:Pro:18.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8925-1.json"
Ubuntu:Pro:20.04:LTS
libyaml-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.30-1ubuntu0.20.04.1~esm1

Affected versions

1.*
1.29-1
1.30-1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libyaml-perl",
            "binary_version":  "1.30-1ubuntu0.20.04.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-63676",
            "severity":  [
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8925-1.json"
Ubuntu:Pro:26.04:LTS
libyaml-perl

Package

Name
libyaml-perl
Purl
pkg:deb/ubuntu/libyaml-perl?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.31-1ubuntu0.26.04.1~esm1

Affected versions

1.*
1.31-1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libyaml-perl",
            "binary_version":  "1.31-1ubuntu0.26.04.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-63676",
            "severity":  [
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:Pro:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8925-1.json"