OESA-2026-1947 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: mptcp: Initialise rcvmss before calling tcpsendactivereset in mptcpdofastclose. syzbot reported divide-by-zero in tcpselectwindow by MPTCP socket. 0 We had a...

CVE-2025-68291

The CVE-2025-68291 issue affects the Linux kernel MPTCP path: in mptcp_do_fastclose(), rcv_mss was not initialised before triggering tcp_send_active_reset(), leading to a divide-by-zero in __tcp_select_window() for MPTCP sockets. The fix mirrors a prior bare-TCP patch by initialising rcv_mss (to ...

UBUNTU-CVE-2021-47419

In the Linux kernel, the following vulnerability has been resolved: net/sched: schtaprio: properly cancel timer from tapriodestroy There is a comment in qdisccreate about us not calling ops-reset in some cases. errout4: / Any broken qdiscs that would require a ops-reset here? The qdisc was never ...