CVE-2026-80847

CVE-2026-80847 affects the Linux kernel TCP subsystem. The root cause is a divide-by-zero in tcp_select_initial_window(), which assumes the advertised MSS (advmss) is at least 1. Route-derived advmss values can violate this assumption—either via an explicit too-small RTAX_ADVMSS or through the de...

CVE-2026-80847

In the Linux kernel, the following vulnerability has been resolved: tcp: clamp route advmss to TCPMINMSS tcpselectinitialwindow assumes that callers never pass an MSS smaller than 1, but route-derived advmss values can violate that assumption. A too-small explicit RTAXADVMSS is one way to get...

Linux Distros Unpatched Vulnerability : CVE-2026-80847

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - tcp: clamp route advmss to TCPMINMSS tcpselectinitialwindow assumes that callers never pass an MSS smaller than 1, but route-derived advmss values can violate...