Linux kernel 2.6.32.66 LTS is quite a small maintenance release of the 2.6.32 kernel series, which brings several improvements to the x86 architecture, a few updated drivers, especially for InfiniBand (IB), Serial, and SPI devices, fixes to the HFS+, ISOFS, and OCFS2 filesystems, several networking enhancements for both IPv6 and IPv4 protocols, but also for Netfilter, RDS, RxRPC, Stream Control Transmission Protocol (SCTP), and an Open Sound System (OSS) fix.