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【漏洞复现】Linux 提权通杀漏洞(影响巨大)

  • 2026-06-30 09:54:30
【漏洞复现】Linux 提权通杀漏洞(影响巨大)
本文只做技术研究，请遵守相关法律法规，切勿非法测试，所产生的后果需自行承担，如有侵权，请联系删除。

漏洞描述

  1. 借助unshare创建用户命名空间和网络命名空间，获得局部权限；
  2. 利用内核 XFRM（IPSec）或 AF_RXRPC 协议的漏洞，通过splice/vmsplice等系统调用篡改内核页缓存（page-cache），覆盖关键文件（如/usr/bin/su）的内容，注入提权 shellcode；
  3. 最终通过执行被篡改的文件实现权限提升。

漏洞复现

ubuntu
Python环境
C环境-命令
gcc -O0 -Wall -o exp exp.c -lutil && ./exp
麒麟
C环境-命令
gcc -O0 -Wall -o exp exp.c -lutil && ./exp
exp获取
Python环境
关注公众号回复CVE-2026-Python
C环境
关注公众号回复CVE-2026-C
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  1. 请求信息 : 2026-07-03 20:34:31 HTTP/2.0 GET : https://f.mffb.com.cn/a/492161.html
  2. 运行时间 : 0.310487s [ 吞吐率：3.22req/s ] 内存消耗：4,658.66kb 文件加载：140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=6de106d4b36f5dcefb427950dcbd79dc
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  1. CONNECT:[ UseTime:0.000521s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000615s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000273s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001988s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000551s ]
  6. SELECT * FROM `set` [ RunTime:0.012859s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000744s ]
  8. SELECT * FROM `article` WHERE `id` = 492161 LIMIT 1 [ RunTime:0.001534s ]
  9. UPDATE `article` SET `lasttime` = 1783082071 WHERE `id` = 492161 [ RunTime:0.010288s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000519s ]
  11. SELECT * FROM `article` WHERE `id` < 492161 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.006463s ]
  12. SELECT * FROM `article` WHERE `id` > 492161 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.014850s ]
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  14. SELECT * FROM `article` WHERE `id` < 492161 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009395s ]
  15. SELECT * FROM `article` WHERE `id` < 492161 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.042877s ]
0.312145s