• CVE-2021-47356

发布时间: 2024年6月7日

修改时间: 2025年4月13日

概要

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.

CVSS v3 指标

NVD openEuler
Confidentiality None None
Attack Vector Local Local
CVSS评分 N/A 7.7
Attack Complexity Low Low
Privileges Required None None
Scope Unchanged Unchanged
Integrity High High
User Interaction None None
Availability High High

安全公告

公告名 概要 发布时间
KylinSec-SA-2024-4779 kernel security update 2024年6月7日
KylinSec-SA-2024-4957 kernel security update 2024年6月14日

影响产品

产品 状态
KY3.4-5A kernel Fixed
KY3.5.2 kernel Fixed
KY3.5.2 kernel Unaffected
V6 kernel Unaffected