CVE-2022-49852 Information

Description

In the Linux kernel the following vulnerability has been resolved:

riscv: process: fix kernel info leakage

thread_struct’s s[12] may contain random kernel memory content which may be finally leaked to userspace. This is a security hole. Fix it by clearing the s[12] array in thread_struct when fork.

As for kthread case it’s better to clear the s[12] array as well.

Reference

https://git.kernel.org/stable/c/358a68f98304b40b201ba5afe94c20355aa3dc68 https://git.kernel.org/stable/c/6510c78490c490a6636e48b61eeaa6fb65981f4b https://git.kernel.org/stable/c/c4601d30f7d989b4f354df899ab85b5f7a750d30 https://git.kernel.org/stable/c/c5c0b3167537793a7cf936fb240366eefd2fc7fb https://git.kernel.org/stable/c/cc36c7fa5d9384602529ba3eea8c5daee7be4dbc https://git.kernel.org/stable/c/e56d18a976dda653194218df6d40d8122c775712