CVE-2026-90954 Busybox: busybox: dpkg-deb extraction-root escape via per-ar-member deferred symlink flush

A flaw was found in BusyBox's dpkg-deb archive extraction. The ar archive handler flushes deferred symlinks after each archive member, unlike the tar, cpio, and unzip handlers which flush once after the last member. A specially crafted .deb archive with two data.tar members can exploit this...