UBUNTU-CVE-2025-11683

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2025-11683
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11683.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-11683
Upstream
Downstream
Published
2025-10-16T01:15:00Z
Modified
2026-05-20T16:20:20.111044010Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure Missing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read The issue is seen with complex YAML files with a hash of all keys and empty values.  There is no indication that the issue leads to accessing memory outside that allocated to the module.

References

Affected packages

Ubuntu:25.10
libyaml-syck-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.34-3ubuntu0.1

Affected versions

1.*
1.34-2build4
1.34-3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libyaml-syck-perl",
            "binary_version": "1.34-3ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11683.json"
Ubuntu:26.04:LTS
libyaml-syck-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.34-3
1.34-4
1.36-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyaml-syck-perl",
            "binary_version": "1.36-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11683.json"
Ubuntu:Pro:16.04:LTS
libyaml-syck-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.29-1ubuntu0.16.04.1~esm1

Affected versions

1.*
1.27-2build2
1.29-1
1.29-1build1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libyaml-syck-perl",
            "binary_version": "1.29-1ubuntu0.16.04.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11683.json"
Ubuntu:Pro:18.04:LTS
libyaml-syck-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.29-1ubuntu0.18.04.1~esm1

Affected versions

1.*
1.29-1build3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libyaml-syck-perl",
            "binary_version": "1.29-1ubuntu0.18.04.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11683.json"
Ubuntu:Pro:20.04:LTS
libyaml-syck-perl

Package

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

Affected ranges

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

Affected versions

1.*
1.31-1
1.31-1build1

Ecosystem specific 

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

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11683.json"
Ubuntu:Pro:22.04:LTS
libyaml-syck-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.34-1ubuntu0.1~esm1

Affected versions

1.*
1.34-1build1
1.34-1build2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libyaml-syck-perl",
            "binary_version": "1.34-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11683.json"
Ubuntu:Pro:24.04:LTS
libyaml-syck-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.34-2ubuntu0.24.04.1~esm1

Affected versions

1.*
1.34-2
1.34-2build1
1.34-2build2
1.34-2build3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libyaml-syck-perl",
            "binary_version": "1.34-2ubuntu0.24.04.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11683.json"