VULNERABILITY INTELLIGENCE

CVE-2026-9538

CVSS score7.5 HIGH
EPSS probability0.52%
CISA KEVNot currently listed
Published2026-05-26
Last modified2026-07-23
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • CWE-789: Memory Allocation with Excessive Size Value

Primary references