ALAS2023-2026-1805

References: CVE-2026-42496  CVE-2026-42497  CVE-2026-9538 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

Archive::Tar versions before 3.08 for Perl extract symlinks with attacker controlled targets outside the extraction directory. _make_special_file() passes the tar header's linkname to symlink() without validating it against absolute paths or .. segments. The secure-extract mode check that guards regular file extraction does not cover the symlink target. A subsequent open through the extracted name reads or writes the attacker chosen path.

NOTE: https://lists.security.metacpan.org/cve-announce/msg/40396459/ (CVE-2026-42496)

Archive::Tar versions before 3.08 for Perl extract hardlinks to attacker controlled paths outside the extraction directory. _make_special_file() passes the tar header's linkname to link() without validating it against absolute paths or .. segments, creating a hardlink that shares the victim file's inode. A subsequent write through the extracted name modifies the victim file, and the post-extraction chmod, chown, and utime block in _extract_file() (guarded only against symlinks via -l) applies the tar header's mode, owner, and timestamps to the shared inode during extraction alone.

NOTE: https://lists.security.metacpan.org/cve-announce/msg/40396457/ (CVE-2026-42497)

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.

NOTE: https://lists.security.metacpan.org/cve-announce/msg/40396448/ (CVE-2026-9538)

Issue Correction:
Run dnf update perl-Archive-Tar --releasever 2023.12.20260608 or dnf update --advisory ALAS2023-2026-1805 --releasever 2023.12.20260608 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation

New Packages:

noarch:
    perl-Archive-Tar-3.04-522.amzn2023.0.3.noarch
    perl-Archive-Tar-tests-3.04-522.amzn2023.0.3.noarch

src:
    perl-Archive-Tar-3.04-522.amzn2023.0.3.src