CVE-2022-49001: Linux Kernel

High severity, CVSS 7.0. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: riscv: fix race when vmap stack overflow Currently, when detecting vmap stack overflow, riscv firstly switches to the so called shadow stack, then use this shadow stack to call the get_overflow_stack() to get the overflow stack. However, there's a race here if two or more harts use the same shadow stack at the same time. To solve this race, we introduce spin_shadow_stack atomic var, which will be swap between its own address and 0 in atomic way, when the var is set, it means the shadow_stack is being used; when the var is cleared, it means the shadow_stack isn't being used. [Palmer: Add AQ to the swap, and also some comments.]

Affected products

• Linux Linux Kernel: from 5.14, before 5.15.82 (fixed in 5.15.82); from 5.16, before 6.0.12 (fixed in 6.0.12); version 6.1 only

Published 2024-10-21. Last modified 2026-08-04.