Debian: CVE-2022-48874: linux -- security update

Debian: CVE-2022-48874: linux -- security update

Severity

7

CVSS

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

Published

08/22/2024

Created

08/23/2024

Added

08/22/2024

Modified

01/28/2025

Description

In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Fix use-after-free and race in fastrpc_map_find Currently, there is a race window between the point when the mutex is unlocked in fastrpc_map_lookup and the reference count increasing (fastrpc_map_get) in fastrpc_map_find, which can also lead to use-after-free. So lets merge fastrpc_map_find into fastrpc_map_lookup which allows us to both protect the maps list by also taking the &fl->lock spinlock and the reference count, since the spinlock will be released only after. Add take_ref argument to make this suitable for all callers.

Solution(s)

• debian-upgrade-linux

References

• https://attackerkb.com/topics/cve-2022-48874
• CVE - 2022-48874