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), 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.

Score

CVSS 3.1 7.5 High

Status

Modified - 9b29abf9-4ab0-4765-b253-1875cd9b441e

Published

2026-05-26

Last modified

2026-05-28

Weaknesses

CWE-789

Affected products

• \ (Archive\)
• Archivetar (Bingos)

References

• 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