BINGOS Archive::Tar up to 3.9 on Perl Header _read_tar memory allocation

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability has been found in BINGOS Archive::Tar up to 3.9 on Perl and classified as problematic. This vulnerability affects the function _read_tar of the component Header Handler. This manipulation causes memory allocation. The identification of this vulnerability is CVE-2026-9538. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in BINGOS Archive::Tar up to 3.9 on Perl. Affected by this vulnerability is the function _read_tar of the component Header Handler. The manipulation with an unknown input leads to a memory allocation vulnerability. The CWE definition for the vulnerability is CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. As an impact it is known to affect availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-9538 since 05/26/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 316803 (Linux Distros Unpatched Vulnerability : CVE-2026-9538), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.10 eliminates this vulnerability. Applying the patch f9af01426038e29d9578825a0cd3626946ab08c7 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (316803) and EUVD (EUVD-2026-31775). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

ADP CISA Base Score: 7.5
ADP CISA Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory allocation
CWE: CWE-789 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 316803
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-9538

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Archive::Tar 3.10
Patch: f9af01426038e29d9578825a0cd3626946ab08c7

Timelineinfo

05/26/2026 Advisory disclosed
05/26/2026 +0 days CVE reserved
05/26/2026 +0 days VulDB entry created
06/01/2026 +6 days VulDB entry last update

Sourcesinfo

Advisory: f9af01426038e29d9578825a0cd3626946ab08c7
Status: Confirmed

CVE: CVE-2026-9538 (🔒)
GCVE (CVE): GCVE-0-2026-9538
GCVE (VulDB): GCVE-100-365599
EUVD: 🔒

Entryinfo

Created: 05/26/2026 07:18
Updated: 06/01/2026 12:46
Changes: 05/26/2026 07:18 (60), 05/26/2026 10:59 (1), 05/29/2026 16:57 (2), 06/01/2026 12:46 (20)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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