Linux Kernel Vulnerability in tty n_gsm Component

CVE-2022-49941

What is CVE-2022-49941?

A vulnerability has been identified in the Linux kernel's tty subsystem, specifically in the n_gsm component. The issue stems from the incorrect use of sleepable functions while in atomic context, leading to potential deadlocks or unexpected behavior when calling console_lock. This could impact systems negatively by introducing instability during critical operations. To resolve this issue, a security patch has been implemented that replaces the problematic spinlock with a mutex, thereby ensuring that the system can operate securely without risking the invocation of sleeping operations within an atomic context.

References