SECURITY UPDATE: stack-based buffer overflow in rrdcached CREATE request
handling
debian/patches/CVE-2026-43958.patch: bound the av[] argument array in
handle_request_create() so an oversized CREATE request with more than
128 DS:/RRA: definitions can no longer overflow the stack buffer, plus
the accompanying upstream hardening in rrd_xport, rrd_graph,
rrd_graph_helper and rrd_daemon. The rrd_xport fill loop uses the
index-based bounds check from upstream follow-up a8174e6a rather than
the timestamp comparison it originally shipped with.