CVE-2026-48959 IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward

IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward. fastForward compares length $offset the digit count of the offset, 1 to 19 against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration...