ima：修复 dentry 的 dname.name 上的 use-after-free 问题（CVE-2024-39494）

CVE编号

CVE-2024-39494

利用情况

暂无

补丁情况

N/A

披露时间

2024-07-12

漏洞描述

In the Linux kernel, the following vulnerability has been resolved: ima: Fix use-after-free on a dentry's dname.name ->d_name.name can change on rename and the earlier value can be freed; there are conditions sufficient to stabilize it (->d_lock on dentry, ->d_lock on its parent, ->i_rwsem exclusive on the parent's inode, rename_lock), but none of those are met at any of the sites. Take a stable snapshot of the name instead.

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://git.kernel.org/stable/c/7fb374981e31c193b1152ed8d3b0a95b671330d4
https://git.kernel.org/stable/c/a78a6f0da57d058e2009e9958fdcef66f165208c
https://git.kernel.org/stable/c/be84f32bb2c981ca670922e047cdde1488b233de
https://git.kernel.org/stable/c/dd431c3ac1fc34a9268580dd59ad3e3c76b32a8c

CVSS3评分 N/A

• 攻击路径 N/A
• 攻击复杂度 N/A
• 权限要求 N/A
• 影响范围 N/A
• 用户交互 N/A
• 可用性 N/A
• 保密性 N/A
• 完整性 N/A

N/A

CWE-ID	漏洞类型

Exp相关链接

- avd.aliyun.com