CVE-2026-9538

HIGH EPSS 34.9%
Published May 26, 20261mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published May 26, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
34.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-789

Affected Products 1

VendorProductVersionRange
archive\\tar_project <3.10

References 3

  • openwall.com http://www.openwall.com/lists/oss-security/2026/05/26/4
    Mailing ListThird Party Advisory
  • github.com https://github.com/jib/archive-tar-new/commit/f9af01426038e29d9578825a0cd3626946ab08c7.patch
    Patch
  • metacpan.org https://metacpan.org/release/BINGOS/Archive-Tar-3.10/changes
    Release Notes

Remediation

  • github.com https://github.com/jib/archive-tar-new/commit/f9af01426038e29d9578825a0cd3626946ab08c7.patch
    Patch