A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system.
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | 4.5 (including) | 4.9.231 (excluding) |
| Linux_kernel | Linux | 4.10 (including) | 4.14.189 (excluding) |
| Linux_kernel | Linux | 4.15 (including) | 4.19.134 (excluding) |
| Linux_kernel | Linux | 4.20 (including) | 5.4.53 (excluding) |
| Linux_kernel | Linux | 5.5 (including) | 5.7.10 (excluding) |