CVE-2022-49776

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> macvlan: enforce a consistent minimal mtu<br /> <br /> macvlan should enforce a minimal mtu of 68, even at link creation.<br /> <br /> This patch avoids the current behavior (which could lead to crashes<br /> in ipv6 stack if the link is brought up)<br /> <br /> $ ip link add macvlan1 link eno1 mtu 8 type macvlan # This should fail !<br /> $ ip link sh dev macvlan1<br /> 5: macvlan1@eno1: mtu 8 qdisc noop<br /> state DOWN mode DEFAULT group default qlen 1000<br /> link/ether 02:47:6c:24:74:82 brd ff:ff:ff:ff:ff:ff<br /> $ ip link set macvlan1 mtu 67<br /> Error: mtu less than device minimum.<br /> $ ip link set macvlan1 mtu 68<br /> $ ip link set macvlan1 mtu 8<br /> Error: mtu less than device minimum.