An issue was discovered in the Linux kernel before 5.0.9. There is a use-after-free in atalk_proc_exit, related to net/appletalk/atalk_proc.c, net/appletalk/ddp.c, and net/appletalk/sysctl_net_atalk.c. #### Notes Author| Note ---|--- [sbeattie](<https://launchpad.net/~sbeattie>) | use-after-free occurs during module unload after proc initialization failure.

Affected Package

OS OS Version Package Name Package Version
ubuntu 19.04 linux 5.0.0-21.22
ubuntu 12.04 linux any
ubuntu 14.04 linux any
ubuntu upstream linux 5.1~rc1
ubuntu 16.04 linux 4.4.0-150.176
ubuntu 19.04 linux-aws was pending \[5.0.0-1011.12\] now end-of-life
ubuntu 14.04 linux-aws any
ubuntu upstream linux-aws 5.1~rc1
ubuntu 16.04 linux-aws 4.4.0-1084.94
ubuntu upstream linux-aws-5.0 5.1~rc1
ubuntu upstream linux-aws-hwe 5.1~rc1
ubuntu 16.04 linux-aws-hwe 4.15.0-1047.49~16.04.1
ubuntu 19.04 linux-azure 5.0.0-1012.12
ubuntu 14.04 linux-azure any
ubuntu upstream linux-azure 5.1~rc1
ubuntu 16.04 linux-azure 4.15.0-1056.61
ubuntu upstream linux-azure-5.3 5.1~rc1
ubuntu upstream linux-azure-edge 5.1~rc1
ubuntu 16.04 linux-azure-edge 4.15.0-1056.61
ubuntu 19.04 linux-gcp 5.0.0-1011.11
ubuntu upstream linux-gcp 5.1~rc1
ubuntu 16.04 linux-gcp 4.15.0-1041.43
ubuntu upstream linux-gcp-5.3 5.1~rc1
ubuntu upstream linux-gcp-edge 5.1~rc1
ubuntu upstream linux-gke-4.15 5.1~rc1
ubuntu upstream linux-gke-5.0 5.1~rc1
ubuntu upstream linux-hwe 5.1~rc1
ubuntu 16.04 linux-hwe 4.15.0-60.67~16.04.1
ubuntu upstream linux-hwe-edge 5.1~rc1
ubuntu 16.04 linux-hwe-edge 4.15.0-60.67~16.04.1
ubuntu 19.04 linux-kvm 5.0.0-1011.12
ubuntu upstream linux-kvm 5.1~rc1
ubuntu 16.04 linux-kvm 4.4.0-1047.53
ubuntu 12.04 linux-lts-trusty any
ubuntu upstream linux-lts-trusty 5.1~rc1
ubuntu 14.04 linux-lts-xenial any
ubuntu upstream linux-lts-xenial 5.1~rc1
ubuntu 19.04 linux-oem was pending \[4.15.0-1056.65\] now end-of-life
ubuntu 19.10 linux-oem 4.15.0-1059.68
ubuntu upstream linux-oem 5.1~rc1
ubuntu 16.04 linux-oem any
ubuntu upstream linux-oem-5.4 5.1~rc1
ubuntu 19.04 linux-oem-osp1 was pending \[5.0.0-1015.16\] now end-of-life
ubuntu 19.10 linux-oem-osp1 5.0.0-1018.20
ubuntu upstream linux-oem-osp1 5.1~rc1
ubuntu 19.04 linux-oracle 5.0.0-1004.8
ubuntu upstream linux-oracle 5.1~rc1
ubuntu 16.04 linux-oracle 4.15.0-1022.25~16.04.1
ubuntu upstream linux-oracle-5.0 5.1~rc1
ubuntu 19.04 linux-raspi2 was pending \[5.0.0-1013.13\] now end-of-life
ubuntu upstream linux-raspi2 5.1~rc1
ubuntu 16.04 linux-raspi2 4.4.0-1110.118
ubuntu upstream linux-raspi2-5.3 5.1~rc1
ubuntu 19.04 linux-snapdragon 5.0.0-1017.18
ubuntu upstream linux-snapdragon 5.1~rc1
ubuntu 16.04 linux-snapdragon 4.4.0-1114.119