USN-8736-1

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Source
https://ubuntu.com/security/notices/USN-8736-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8736-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8736-1
Upstream
Related
Published
2026-09-08T14:25:07Z
Modified
2026-09-09T00:42:26Z
Summary
perl vulnerabilities
Details

It was discovered that Perl incorrectly handled certain large inputs during regular expression matching. An attacker could possibly use this issue to trigger out-of-bounds heap reads or writes, resulting in a denial of service or arbitrary code execution. (CVE-2026-15534)

It was discovered that Perl incorrectly handled certain regular expression containing alternative matching branches. An attacker could possibly use this issue to cause incorrect regular expression matches, resulting in security restrictions being bypassed. (CVE-2026-19487)

References

Affected packages

Ubuntu:22.04:LTS
perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.34.0-3ubuntu1.9

Affected versions

5.*
5.32.1-3ubuntu3
5.34.0-3ubuntu1
5.34.0-3ubuntu1.1
5.34.0-3ubuntu1.2
5.34.0-3ubuntu1.3
5.34.0-3ubuntu1.4
5.34.0-3ubuntu1.5
5.34.0-3ubuntu1.7
5.34.0-3ubuntu1.8

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libperl5.34",
            "binary_version": "5.34.0-3ubuntu1.9"
        },
        {
            "binary_name": "perl",
            "binary_version": "5.34.0-3ubuntu1.9"
        },
        {
            "binary_name": "perl-base",
            "binary_version": "5.34.0-3ubuntu1.9"
        },
        {
            "binary_name": "perl-debug",
            "binary_version": "5.34.0-3ubuntu1.9"
        },
        {
            "binary_name": "perl-modules-5.34",
            "binary_version": "5.34.0-3ubuntu1.9"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-15534",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-19487",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                    "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-8736-1.json"
Ubuntu:26.04:LTS
perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.40.1-7ubuntu0.2

Affected versions

5.*
5.40.1-6build1
5.40.1-7build1
5.40.1-7ubuntu0.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libperl5.40",
            "binary_version": "5.40.1-7ubuntu0.2"
        },
        {
            "binary_name": "perl",
            "binary_version": "5.40.1-7ubuntu0.2"
        },
        {
            "binary_name": "perl-base",
            "binary_version": "5.40.1-7ubuntu0.2"
        },
        {
            "binary_name": "perl-debug",
            "binary_version": "5.40.1-7ubuntu0.2"
        },
        {
            "binary_name": "perl-modules-5.40",
            "binary_version": "5.40.1-7ubuntu0.2"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-15534",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-19487",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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-8736-1.json"
Ubuntu:Pro:14.04:LTS
perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.18.2-2ubuntu1.7+esm9

Affected versions

5.*
5.14.2-21build1
5.18.1-4
5.18.1-4build1
5.18.1-5
5.18.2-2
5.18.2-2ubuntu1
5.18.2-2ubuntu1.1
5.18.2-2ubuntu1.3
5.18.2-2ubuntu1.4
5.18.2-2ubuntu1.6
5.18.2-2ubuntu1.7
5.18.2-2ubuntu1.7+esm3
5.18.2-2ubuntu1.7+esm4
5.18.2-2ubuntu1.7+esm5
5.18.2-2ubuntu1.7+esm7
5.18.2-2ubuntu1.7+esm8

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libcgi-fast-perl",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
        },
        {
            "binary_name": "libperl5.18",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
        },
        {
            "binary_name": "perl",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
        },
        {
            "binary_name": "perl-base",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
        },
        {
            "binary_name": "perl-debug",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
        },
        {
            "binary_name": "perl-modules",
            "binary_version": "5.18.2-2ubuntu1.7+esm9"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-15534",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-19487",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                    "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-8736-1.json"
Ubuntu:Pro:16.04:LTS
perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.22.1-9ubuntu0.9+esm4

Affected versions

5.*
5.20.2-6
5.22.1-3
5.22.1-4
5.22.1-5
5.22.1-7
5.22.1-8
5.22.1-9
5.22.1-9ubuntu0.2
5.22.1-9ubuntu0.3
5.22.1-9ubuntu0.5
5.22.1-9ubuntu0.6
5.22.1-9ubuntu0.9
5.22.1-9ubuntu0.9+esm1
5.22.1-9ubuntu0.9+esm2
5.22.1-9ubuntu0.9+esm3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libperl5.22",
            "binary_version": "5.22.1-9ubuntu0.9+esm4"
        },
        {
            "binary_name": "perl",
            "binary_version": "5.22.1-9ubuntu0.9+esm4"
        },
        {
            "binary_name": "perl-base",
            "binary_version": "5.22.1-9ubuntu0.9+esm4"
        },
        {
            "binary_name": "perl-debug",
            "binary_version": "5.22.1-9ubuntu0.9+esm4"
        },
        {
            "binary_name": "perl-modules-5.22",
            "binary_version": "5.22.1-9ubuntu0.9+esm4"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-15534",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-19487",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                    "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-8736-1.json"
Ubuntu:Pro:18.04:LTS
perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.26.1-6ubuntu0.7+esm4

Affected versions

5.*
5.26.0-8ubuntu1
5.26.1-2ubuntu1
5.26.1-3
5.26.1-4
5.26.1-4build1
5.26.1-5
5.26.1-6
5.26.1-6ubuntu0.1
5.26.1-6ubuntu0.2
5.26.1-6ubuntu0.3
5.26.1-6ubuntu0.5
5.26.1-6ubuntu0.6
5.26.1-6ubuntu0.7
5.26.1-6ubuntu0.7+esm2
5.26.1-6ubuntu0.7+esm3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libperl5.26",
            "binary_version": "5.26.1-6ubuntu0.7+esm4"
        },
        {
            "binary_name": "perl",
            "binary_version": "5.26.1-6ubuntu0.7+esm4"
        },
        {
            "binary_name": "perl-base",
            "binary_version": "5.26.1-6ubuntu0.7+esm4"
        },
        {
            "binary_name": "perl-debug",
            "binary_version": "5.26.1-6ubuntu0.7+esm4"
        },
        {
            "binary_name": "perl-modules-5.26",
            "binary_version": "5.26.1-6ubuntu0.7+esm4"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-15534",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-19487",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                    "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-8736-1.json"
Ubuntu:Pro:20.04:LTS
perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.30.0-9ubuntu0.5+esm4

Affected versions

5.*
5.28.1-6build1
5.30.0-7
5.30.0-9
5.30.0-9build1
5.30.0-9ubuntu0.2
5.30.0-9ubuntu0.3
5.30.0-9ubuntu0.4
5.30.0-9ubuntu0.5
5.30.0-9ubuntu0.5+esm2
5.30.0-9ubuntu0.5+esm3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libperl5.30",
            "binary_version": "5.30.0-9ubuntu0.5+esm4"
        },
        {
            "binary_name": "perl",
            "binary_version": "5.30.0-9ubuntu0.5+esm4"
        },
        {
            "binary_name": "perl-base",
            "binary_version": "5.30.0-9ubuntu0.5+esm4"
        },
        {
            "binary_name": "perl-debug",
            "binary_version": "5.30.0-9ubuntu0.5+esm4"
        },
        {
            "binary_name": "perl-modules-5.30",
            "binary_version": "5.30.0-9ubuntu0.5+esm4"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-15534",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-19487",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                    "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-8736-1.json"