Debian: CVE-2022-49001: linux -- security update

Debian: CVE-2022-49001: linux -- security update

Severity

7

CVSS

(AV:L/AC:M/Au:S/C:C/I:C/A:C)

Published

10/23/2024

Created

10/24/2024

Added

10/23/2024

Modified

01/30/2025

Description

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.]

Solution(s)

• debian-upgrade-linux

References

• https://attackerkb.com/topics/cve-2022-49001
• CVE - 2022-49001