CVE-2022-49776

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

• linux linux kernel (>= 4.10 < 4.14.300) • linux linux kernel (>= 4.15 < 4.19.267) • linux linux kernel (>= 4.20 < 5.4.225) • linux linux kernel (>= 5.5 < 5.10.156) • linux linux kernel (>= 5.11 < 5.15.80) • linux linux kernel (>= 5.16 < 6.0.10)