xen/netfront：对失败的 gnttab_end_foreign_access_ref() 做出正确反应 (CVE-2022-48900)

CVE编号

CVE-2022-48900

利用情况

暂无

补丁情况

N/A

披露时间

2024-08-22

漏洞描述

In the Linux kernel, the following vulnerability has been resolved: xen/netfront: react properly to failing gnttab_end_foreign_access_ref() When calling gnttab_end_foreign_access_ref() the returned value must be tested and the reaction to that value should be appropriate. In case of failure in xennet_get_responses() the reaction should not be to crash the system, but to disable the network device. The calls in setup_netfront() can be replaced by calls of gnttab_end_foreign_access(). While at it avoid double free of ring pages and grant references via xennet_disconnect_backend() in this case. This is CVE-2022-23042 / part of XSA-396. --- V2: - avoid double free V3: - remove pointless initializer (Jan Beulich)

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

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