UBUNTU-CVE-2026-9538
- Source
- https://ubuntu.com/security/CVE-2026-9538
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9538.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-9538
- Upstream
- Published
- 2026-05-26T02:16:00Z
- Modified
- 2026-05-29T18:01:01.753968778Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header. readtar() reads each entry's payload with $handle->read($$data, $block), where $block is derived from the entry's 12-byte size field in the tar header with no upper bound on that value. A crafted header declaring a multi-gigabyte size causes Perl to allocate a scalar of that size.
- References
-
- https://ubuntu.com/security/CVE-2026-9538
- https://www.cve.org/CVERecord?id=CVE-2026-9538
- https://lists.security.metacpan.org/cve-announce/msg/40396448/
- https://github.com/jib/archive-tar-new/commit/f9af01426038e29d9578825a0cd3626946ab08c7.patch
- https://metacpan.org/release/BINGOS/Archive-Tar-3.10/changes
- http://www.openwall.com/lists/oss-security/2026/05/26/4
Affected packages
Ubuntu:18.04:LTS
perl
Package
- Name
- perl
- Purl
- pkg:deb/ubuntu/perl?arch=source&distro=bionic
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affected
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
Ecosystem specific
{
"binaries": [
{
"binary_name": "libperl5.26",
"binary_version": "5.26.1-6ubuntu0.7"
},
{
"binary_name": "perl",
"binary_version": "5.26.1-6ubuntu0.7"
},
{
"binary_name": "perl-base",
"binary_version": "5.26.1-6ubuntu0.7"
},
{
"binary_name": "perl-debug",
"binary_version": "5.26.1-6ubuntu0.7"
},
{
"binary_name": "perl-modules-5.26",
"binary_version": "5.26.1-6ubuntu0.7"
}
]
}Ubuntu:20.04:LTS
perl
Package
- Name
- perl
- Purl
- pkg:deb/ubuntu/perl?arch=source&distro=focal
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affected
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
Ecosystem specific
{
"binaries": [
{
"binary_name": "libperl5.30",
"binary_version": "5.30.0-9ubuntu0.5"
},
{
"binary_name": "perl",
"binary_version": "5.30.0-9ubuntu0.5"
},
{
"binary_name": "perl-base",
"binary_version": "5.30.0-9ubuntu0.5"
},
{
"binary_name": "perl-debug",
"binary_version": "5.30.0-9ubuntu0.5"
},
{
"binary_name": "perl-modules-5.30",
"binary_version": "5.30.0-9ubuntu0.5"
}
]
}Ubuntu:22.04:LTS
perl
Package
- Name
- perl
- Purl
- pkg:deb/ubuntu/perl?arch=source&distro=jammy
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affected
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
Ecosystem specific
{
"binaries": [
{
"binary_name": "libperl5.34",
"binary_version": "5.34.0-3ubuntu1.5"
},
{
"binary_name": "perl",
"binary_version": "5.34.0-3ubuntu1.5"
},
{
"binary_name": "perl-base",
"binary_version": "5.34.0-3ubuntu1.5"
},
{
"binary_name": "perl-debug",
"binary_version": "5.34.0-3ubuntu1.5"
},
{
"binary_name": "perl-modules-5.34",
"binary_version": "5.34.0-3ubuntu1.5"
}
]
}Ubuntu:24.04:LTS
perl
Package
- Name
- perl
- Purl
- pkg:deb/ubuntu/perl?arch=source&distro=noble
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affected
Affected versions
5.*
5.36.0-9ubuntu1
5.36.0-10ubuntu1
5.38.2-3
5.38.2-3.2
5.38.2-3.2build1
5.38.2-3.2build2
5.38.2-3.2build2.1
5.38.2-3.2ubuntu0.1
5.38.2-3.2ubuntu0.2
Ecosystem specific
{
"binaries": [
{
"binary_name": "libperl5.38t64",
"binary_version": "5.38.2-3.2ubuntu0.2"
},
{
"binary_name": "perl",
"binary_version": "5.38.2-3.2ubuntu0.2"
},
{
"binary_name": "perl-base",
"binary_version": "5.38.2-3.2ubuntu0.2"
},
{
"binary_name": "perl-debug",
"binary_version": "5.38.2-3.2ubuntu0.2"
},
{
"binary_name": "perl-modules-5.38",
"binary_version": "5.38.2-3.2ubuntu0.2"
}
]
}Ubuntu:25.10
perl
Package
- Name
- perl
- Purl
- pkg:deb/ubuntu/perl?arch=source&distro=questing
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affected
Ecosystem specific
{
"binaries": [
{
"binary_name": "libperl5.40",
"binary_version": "5.40.1-6build1"
},
{
"binary_name": "perl",
"binary_version": "5.40.1-6build1"
},
{
"binary_name": "perl-base",
"binary_version": "5.40.1-6build1"
},
{
"binary_name": "perl-debug",
"binary_version": "5.40.1-6build1"
},
{
"binary_name": "perl-modules-5.40",
"binary_version": "5.40.1-6build1"
}
]
}Ubuntu:26.04:LTS
perl
Package
- Name
- perl
- Purl
- pkg:deb/ubuntu/perl?arch=source&distro=resolute
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affected
Ecosystem specific
{
"binaries": [
{
"binary_name": "libperl5.40",
"binary_version": "5.40.1-7build1"
},
{
"binary_name": "perl",
"binary_version": "5.40.1-7build1"
},
{
"binary_name": "perl-base",
"binary_version": "5.40.1-7build1"
},
{
"binary_name": "perl-debug",
"binary_version": "5.40.1-7build1"
},
{
"binary_name": "perl-modules-5.40",
"binary_version": "5.40.1-7build1"
}
]
}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
-
Introduced0Unknown introduced version / All previous versions are affected
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
Ecosystem specific
{
"binaries": [
{
"binary_name": "libcgi-fast-perl",
"binary_version": "5.18.2-2ubuntu1.7+esm5"
},
{
"binary_name": "libperl5.18",
"binary_version": "5.18.2-2ubuntu1.7+esm5"
},
{
"binary_name": "perl",
"binary_version": "5.18.2-2ubuntu1.7+esm5"
},
{
"binary_name": "perl-base",
"binary_version": "5.18.2-2ubuntu1.7+esm5"
},
{
"binary_name": "perl-debug",
"binary_version": "5.18.2-2ubuntu1.7+esm5"
},
{
"binary_name": "perl-modules",
"binary_version": "5.18.2-2ubuntu1.7+esm5"
}
]
}Ubuntu:Pro:16.04:LTS
perl
Package
- Name
- perl
- Purl
- pkg:deb/ubuntu/perl?arch=source&distro=esm-infra%2Fxenial
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affected
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
Ecosystem specific
{
"binaries": [
{
"binary_name": "libperl5.22",
"binary_version": "5.22.1-9ubuntu0.9+esm2"
},
{
"binary_name": "perl",
"binary_version": "5.22.1-9ubuntu0.9+esm2"
},
{
"binary_name": "perl-base",
"binary_version": "5.22.1-9ubuntu0.9+esm2"
},
{
"binary_name": "perl-debug",
"binary_version": "5.22.1-9ubuntu0.9+esm2"
},
{
"binary_name": "perl-modules-5.22",
"binary_version": "5.22.1-9ubuntu0.9+esm2"
}
]
}