CVE-2022-49641 Information

Description

In the Linux kernel the following vulnerability has been resolved:

sysctl: Fix data races in proc_douintvec().

A sysctl variable is accessed concurrently and there is always a chance of data-race. So all readers and writers need some basic protection to avoid load/store-tearing.

This patch changes proc_douintvec() to use READ_ONCE() and WRITE_ONCE() internally to fix data-races on the sysctl side. For now proc_douintvec() itself is tolerant to a data-race but we still need to add annotations on the other subsystem’s side.

Reference

https://git.kernel.org/stable/c/4762b532ec9539755aab61445d5da6e1926ccb99 https://git.kernel.org/stable/c/630c76850d554d7140232e71b5d1663e88cffb54 https://git.kernel.org/stable/c/d335db59f7fb3353f56e52371f1ee796ae9c8f09 https://git.kernel.org/stable/c/d5d54714e329f646bd7af4994fc427d88ee68936