CLSA-2026-1776855642 Fix CVE(s): CVE-2019-17498, CVE-2019-3857

SECURITY UPDATE: Integer overflow leading to out-of-bounds write when SSHMSGCHANNELREQUEST packets with exit signal messages are parsed. - debian/patches/CVE-2019-3857.patch: check namelen + 1 does not overflow before allocation in exit-signal handling. - CVE-2019-3857 SECURITY UPDATE: Integer...