CVE-2021-47555

The CVE-2021-47555 issue affects the Linux kernel VLAN real_dev handling. Injecting an error before dev_hold(real_dev) in register_vlan_dev() caused the real_dev refcount to underflow when the dummy netdevice was removed, triggering a refcount warning and an endless unregister_netdevice loop. The...

CVE-2021-47222 net: bridge: fix vlan tunnel dst refcnt when egressing

In the Linux kernel, the following vulnerability has been resolved: net: bridge: fix vlan tunnel dst refcnt when egressing The egress tunnel code uses dstclone and directly sets the result which is wrong because the entry might have 0 refcnt or be already deleted, causing number of problems. It...