内核：内核同页合并 (ksm) 的最大页面共享可能会导致内存重复数据删除 (CVE-2024-0564)

CVE编号

CVE-2024-0564

利用情况

暂无

补丁情况

N/A

披露时间

2024-01-30

漏洞描述

A flaw was found in the Linux kernel's memory deduplication mechanism. The max page sharing of Kernel Samepage Merging (KSM), added in Linux kernel version 4.4.0-96.119, can create a side channel. When the attacker and the victim share the same host and the default setting of KSM is "max page sharing=256", it is possible for the attacker to time the unmap to merge with the victim's page. The unmapping time depends on whether it merges with the victim's page and additional physical pages are created beyond the KSM's "max page share". Through these operations, the attacker can leak the victim's page.

解决建议

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://access.redhat.com/security/cve/CVE-2024-0564
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1680513
https://bugzilla.redhat.com/show_bug.cgi?id=2258514
https://link.springer.com/conference/wisa
https://wisa.or.kr/accepted

CVSS3评分 4.7

• 攻击路径 相邻
• 攻击复杂度 低
• 权限要求 无
• 影响范围 已更改
• 用户交互 无
• 可用性 无
• 保密性 低
• 完整性 无

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

CWE-ID	漏洞类型

Exp相关链接

- avd.aliyun.com