CVE catalog
CVE-2026-9538
Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header. _read_tar() reads each entry's payload with $handle->read($$data, $block), w
- Severity
- Critical · CVSS 9.1
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.45% · Oct 23, 2026
Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header. _read_tar() reads each entry's payload with $handle->read($$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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | perl | sid | 5.42.3-1 | fixed |
| Debian | perl | forky | 5.42.3-1 | fixed |
| Debian | perl | trixie | 5.40.1-6+deb13u1 | vulnerable |
| Debian | perl | bookworm | 5.36.0-7+deb12u3 | vulnerable |
| Debian | perl | bookworm-security | 5.36.0-7+deb12u4 | vulnerable |
| Cpe | perl | Not reported | Not reported | vulnerable |
| Cpe | \ | Not reported | 3.10 | fixed |
| Ubuntu | perl | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | libperl-dev | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | libperl5.38t64 | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | perl-base | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | perl-debug | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | perl-doc | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | perl-modules-5.38 | noble | 5.38.2-3.2ubuntu0.4 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | perl | source | sid | 5.42.3-1 | not yet assigned | Not reported | [1138861] |
| Debian | perl | source | forky | 5.42.3-1 | not yet assigned | Not reported | [1138861] |
| Debian | perl | source | trixie | (unfixed) | not yet assigned | Not reported | [1138861] |
| Debian | perl | source | bookworm | (unfixed) | not yet assigned | Not reported | [1138861] |
| Cpe | \ | cpe | Not reported | 3.10 | Not reported | Not reported | Not reported |
| Ubuntu | perl | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | libperl-dev | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | libperl5.38t64 | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | perl-base | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | perl-debug | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | perl-doc | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | perl-modules-5.38 | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
Notes
[trixie] perl: Minor issue; wait for regressions upstream sorted out [bookworm] perl: Minor issue; wait for regressions upstream sorted out
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libperl5.36]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· amd64 · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· arm64 · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· amd64 · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· arm64 · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [libperl-dev]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· amd64 · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· arm64 · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· amd64 · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· arm64 · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [perl]Affected
Details (4)
5.36.0-7+deb12u3· amd64 · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· arm64 · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· amd64 · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· arm64 · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [perl-base]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· amd64 · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· arm64 · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· amd64 · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· arm64 · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [perl-debug]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· amd64 · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· arm64 · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· amd64 · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· arm64 · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [perl-doc]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· all · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· all · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· all · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· all · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [perl-modules-5.36]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· all · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· all · bookwormAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· all · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· all · bookworm-securityAffected
nvd · perl · debian · bookworm; nvd · perl · debian · 12
[Debian 13 (Trixie)]
- [libperl5.40]Affected
Source package: [perl]
Details (2)
5.40.1-6· amd64 · trixieAffected
nvd · perl · debian · 13
5.40.1-6· arm64 · trixieAffected
nvd · perl · debian · 13
- [libperl-dev]Affected
Source package: [perl]
Details (2)
5.40.1-6· amd64 · trixieAffected
nvd · perl · debian · 13
5.40.1-6· arm64 · trixieAffected
nvd · perl · debian · 13
- [perl]Affected
Details (2)
5.40.1-6· amd64 · trixieAffected
nvd · perl · debian · 13
5.40.1-6· arm64 · trixieAffected
nvd · perl · debian · 13
- [perl-base]Affected
Source package: [perl]
Details (2)
5.40.1-6· amd64 · trixieAffected
nvd · perl · debian · 13
5.40.1-6· arm64 · trixieAffected
nvd · perl · debian · 13
- [perl-debug]Affected
Source package: [perl]
Details (2)
5.40.1-6· amd64 · trixieAffected
nvd · perl · debian · 13
5.40.1-6· arm64 · trixieAffected
nvd · perl · debian · 13
- [perl-doc]Affected
Source package: [perl]
Details (2)
5.40.1-6· all · trixieAffected
nvd · perl · debian · 13
5.40.1-6· all · trixieAffected
nvd · perl · debian · 13
- [perl-modules-5.40]Affected
Source package: [perl]
Details (2)
5.40.1-6· all · trixieAffected
nvd · perl · debian · 13
5.40.1-6· all · trixieAffected
nvd · perl · debian · 13
Observed:
References
- [https://access.redhat.com/errata/RHSA-2026:49525]
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2026_48225.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-9538]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-9538]
- [https://security-tracker.debian.org/tracker/CVE-2026-9538]
- [https://ubuntu.com/security/notices/USN-8684-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2588.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]