中危 md/raid1：结束失败的写入请求时正确指示失败 (CVE-2021-46950)

CVE编号

CVE-2021-46950

利用情况

暂无

补丁情况

官方补丁

披露时间

2024-02-28
漏洞描述
In the Linux kernel, the following vulnerability has been resolved:

md/raid1: properly indicate failure when ending a failed write request

This patch addresses a data corruption bug in raid1 arrays using bitmaps.
Without this fix, the bitmap bits for the failed I/O end up being cleared.

Since we are in the failure leg of raid1_end_write_request, the request
either needs to be retried (R1BIO_WriteError) or failed (R1BIO_Degraded).
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/12216d0919b64ee2ea5dc7a50e455670f44383d5
https://git.kernel.org/stable/c/2417b9869b81882ab90fd5ed1081a1cb2d4db1dd
https://git.kernel.org/stable/c/538244fba59fde17186322776247cd9c05be86dd
https://git.kernel.org/stable/c/59452e551784b7a57a45d971727e9db63b192515
https://git.kernel.org/stable/c/661061a45e32d8b2cc0e306da9f169ad44011382
https://git.kernel.org/stable/c/6920cef604fa57f9409e3960413e9cc11f5c5a40
https://git.kernel.org/stable/c/a6e17cab00fc5bf85472434c52ac751426257c6f
受影响软件情况
# 类型 厂商 产品 版本 影响面
1
运行在以下环境
系统 debian_10 linux * Up to
(excluding)
4.19.194-1
运行在以下环境
系统 debian_11 linux * Up to
(excluding)
5.10.38-1
运行在以下环境
系统 debian_12 linux * Up to
(excluding)
5.10.38-1
运行在以下环境
系统 linux linux_kernel * From
(including)
4.14.0 		Up to
(excluding)
4.14.233
运行在以下环境
系统 linux linux_kernel * From
(including)
4.15.0 		Up to
(excluding)
4.19.191
运行在以下环境
系统 linux linux_kernel * From
(including)
4.20.0 		Up to
(excluding)
5.4.118
运行在以下环境
系统 linux linux_kernel * From
(including)
5.11.0 		Up to
(excluding)
5.11.20
运行在以下环境
系统 linux linux_kernel * From
(including)
5.12.0 		Up to
(excluding)
5.12.3
运行在以下环境
系统 linux linux_kernel * From
(including)
5.5.0 		Up to
(excluding)
5.10.36
阿里云评分
6.5
  • 攻击路径
    本地
  • 攻击复杂度
    复杂
  • 权限要求
    普通权限
  • 影响范围
    越权影响
  • EXP成熟度
    未验证
  • 补丁情况
    官方补丁
  • 数据保密性
    无影响
  • 数据完整性
    无影响
  • 服务器危害
    无影响
  • 全网数量
    N/A
CWE-ID 漏洞类型
NVD-CWE-noinfo
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