5.10.272 (longterm, Branch 5.10)

Linux kernel 5.10.272 (longterm) was primarily a maintenance and stability release focused on fixing memory safety and networking issues. Among the security-relevant fixes, the most notable addressed a use-after-free vulnerability in IPv4 by ensuring inet_opt and ireq_opt structures are freed only after an RCU grace period, preventing potential exploitation of freed memory. Another key fix validated the checksum_start field before completing checksum calculations in IPv4 processing, guarding against malformed packet handling that could lead to memory corruption. Additionally, a netfilter fix resolved a regression in nfnetlink_queue that had broken SCTP traffic handling, restoring proper packet queue functionality for that protocol.