CVE-2026-9538 – Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header

CVE ID :CVE-2026-9538

Published : May 26, 2026, 12:18 a.m. | 1 hour, 39 minutes 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.

Severity: 0.0 | NA

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