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【漏洞复现】Linux LPE 漏洞:Copy Fail (CVE-2026-31431)

  • 2026-06-29 08:54:17
【漏洞复现】Linux LPE 漏洞:Copy Fail (CVE-2026-31431)

01
概 述
2026年4月29日，国际安全研究团队theori的研究员Taeyang Lee公开披露了Linux内核高危漏洞Copy Fail（CVE-2026-31431）。该漏洞潜伏近9年，影响2017年至今几乎所有主流Linux发行版，攻击者仅需732字节的Python脚本即可稳定获取系统最高权限，甚至突破容器隔离边界。
02
验 证
网络上已有众多Linux版本的漏洞验证复现视频了，笔者在银河麒麟V10（Tercel 版）做了测试，结果如下所示：
03
参 考

1.https://copy.fail/#exploit/

2.https://github.com/theori-io/copy-fail-CVE-2026-31431

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  1. 请求信息 : 2026-07-03 16:37:20 HTTP/2.0 GET : https://f.mffb.com.cn/a/490699.html
  2. 运行时间 : 0.230890s [ 吞吐率：4.33req/s ] 内存消耗：4,495.08kb 文件加载：140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=18895571c0ec469a308731e08acbd2df
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  1. CONNECT:[ UseTime:0.000920s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000840s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000320s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000296s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000468s ]
  6. SELECT * FROM `set` [ RunTime:0.000206s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000511s ]
  8. SELECT * FROM `article` WHERE `id` = 490699 LIMIT 1 [ RunTime:0.005349s ]
  9. UPDATE `article` SET `lasttime` = 1783067840 WHERE `id` = 490699 [ RunTime:0.005547s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000252s ]
  11. SELECT * FROM `article` WHERE `id` < 490699 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000432s ]
  12. SELECT * FROM `article` WHERE `id` > 490699 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000651s ]
  13. SELECT * FROM `article` WHERE `id` < 490699 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000955s ]
  14. SELECT * FROM `article` WHERE `id` < 490699 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.014706s ]
  15. SELECT * FROM `article` WHERE `id` < 490699 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.049474s ]
0.234707s