High severity7.5NVD Advisory· Published May 26, 2026· Updated May 28, 2026
CVE-2026-9538
CVE-2026-9538
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.
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Affected products
2- Range: <3.10
Patches
Vulnerability mechanics
References
3- github.com/jib/archive-tar-new/commit/f9af01426038e29d9578825a0cd3626946ab08c7.patchnvdPatch
- www.openwall.com/lists/oss-security/2026/05/26/4nvdMailing ListThird Party Advisory
- metacpan.org/release/BINGOS/Archive-Tar-3.10/changesnvdRelease Notes
News mentions
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