CVE-2022-0492

Name of the Vulnerable Software and Affected Versions Linux Kernel versions 2.6.24 through 5.16.11 Linux Kernel versions 5.15.0 through 5.15.25 Linux Kernel versions 5.10.0 through 5.10.96 Linux Kernel versions 5.4.0 through 5.4.176 Linux Kernel versions 4.19.0 through 4.19.228 Linux Kernel versions 4.14.0 through 4.14.265 Linux Kernel versions 4.9.0 through 4.9.300

Description An improper authentication flaw exists in the cgroup release agent write function within the kernel/cgroup/cgroup-v1.c file of the Linux kernel. This issue stems from a lack of privilege control when configuring the release agent feature of cgroups v1 (Control Groups v1), which are Linux functions used to limit, account for, and isolate resource use for sets of processes. Under certain circumstances, this allows an attacker to execute arbitrary commands with elevated privileges, bypass namespace isolation, and escape containerized environments to gain root-level access on the host system. This flaw has been actively exploited in real-world attacks.

Recommendations Update the kernel to versions 5.16.12, 5.15.26, 5.10.97, 5.4.177, 4.19.229, 4.14.266, or 4.9.301 depending on the current release branch. Enable AppArmor or SELinux. Enable Seccomp.