https://bugzilla.redhat.com/show_bug.cgi?id=2496665
Bug ID: 2496665
Summary: CVE-2026-9538 perl-Archive-Tar: perl-Archive-Tar:
Denial of Service via crafted tar header with large
entry size [fedora-all]
Product: Fedora
Version: rawhide
Status: NEW
Whiteboard: {"flaws": ["b5c00ee7-f34c-4172-8223-ac36d0fdb32a"]}
Component: perl-Archive-Tar
Keywords: Security, SecurityTracking
Severity: high
Priority: high
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
CC: [email protected], [email protected],
[email protected],
[email protected], [email protected],
[email protected]
Blocks: 2481315
Target Milestone: ---
Classification: Fedora
Disclaimer: Community trackers are created by Red Hat Product Security team on
a best effort basis. Package maintainers are required to ascertain if the flaw
indeed affects their package, before starting the update process.
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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