SECURITY UPDATE: NULL pointer dereference in mod_dav_lock indirect-lock
refresh
debian/patches/CVE-2026-29169.patch: replace all six dp-> reads in
the indirect-lock branch of dav_generic_refresh_locks() with the
resolved dp_scan->... values in modules/dav/lock/locks.c so a crafted
WebDAV LOCK refresh against a resource that only inherits an indirect
lock from a parent no longer dereferences NULL via dp->locktoken /
dp->f.scope / dp->owner. Upstream fix
225dc070adba11040b774cf641e1d8bc79941643 (SVN r1933354).