The latest release of Db2 is available, labeled Db2 11.5.9 (or Db2 11.5 Mod 9 Fix Pack 0). The usual page, download Db2 fix packs by version for DB2 for Linux, UNIX, and Windows, has the binaries. The highlights of Db2 11.5.9 have their own page in the Db2 documentation.