发布于3月6日3月6日 Members Oracle Linux: CVE-2021-47356: ELSA-2024-12606: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories) Severity 6 CVSS (AV:L/AC:L/Au:M/C:C/I:C/A:C) Published 05/21/2024 Created 07/04/2024 Added 07/03/2024 Modified 01/23/2025 Description In the Linux kernel, the following vulnerability has been resolved: mISDN: fix possible use-after-free in HFC_cleanup() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself. A vulnerability was found in the Linux kernel's mISDN driver. This issue arises during the cleanup process, where a timer handler might still be running after the driver has been removed, which can lead to a use-after-free issue, potentially causing a system crash. Solution(s) oracle-linux-upgrade-kernel oracle-linux-upgrade-kernel-uek References https://attackerkb.com/topics/cve-2021-47356 CVE - 2021-47356 ELSA-2024-12606 ELSA-2024-4211
