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Linux 内核高危漏洞披露:一个感叹号,可提权至最高权限

  • 2026-06-28 02:36:11
Linux 内核高危漏洞披露:一个感叹号,可提权至最高权限
大新闻！Linux内核爆出高危提权漏洞，一个写错的感叹号居然搞出大问题！
6月10日消息，科技媒体Ars Technica就在昨天，也就是6月9日发博文爆料：
Linux内核曝出高危提权漏洞CVE-2026-53111——仅仅一个写错的感叹号，就能触发这个漏洞，攻击者最高能直接拿到系统最高root权限！
这个漏洞藏在Linux内核的nf_tables子系统里，根源就是内核代码里那一个错写的字符。看起来只是写错了个感叹号，实际上直接改了对象删除流程的判断逻辑，最后搞出了这个风险极高的提权漏洞。

PART 01

漏洞根源与原理
漏洞出在判决映射删除后的资源回收环节：正常逻辑下，删除后内存里的对应元素会失效，链对象的引用计数也会同步减少；如果删除失败，系统还会回滚操作、恢复引用计数。
可攻击者利用这个漏洞，就能让引用计数被随意反复递减，最后在还有对象指向这条链的时候，提前把它删除释放，直接诱发use-after-free（释放后重用）问题。

PART 02

攻击过程
漏洞发现方Exodus Intelligence表示，攻击者可以多次触发这个漏洞，一步步完成攻击：先泄露内核基址，再泄露堆地址，最后直接劫持控制流，轻轻松松把普通用户权限提升到root级别的最高权限。

PART 03

修复情况
好在补丁早就有了！Linux内核主线今年2月就已经合并了这个漏洞的修复补丁，多个主流Linux发行版也都已经跟进修复。另外Exodus Intelligence本月公开了自己的PoC验证代码，确认这个漏洞可以在Debian和Ubuntu系统上成功触发。
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  137. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
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  139. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/runtime/temp/067d451b9a0c665040f3f1bdd3293d68.php ( 11.98 KB )
  140. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000960s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000847s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.007786s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001182s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000741s ]
  6. SELECT * FROM `set` [ RunTime:0.018714s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000836s ]
  8. SELECT * FROM `article` WHERE `id` = 498649 LIMIT 1 [ RunTime:0.025670s ]
  9. UPDATE `article` SET `lasttime` = 1783021735 WHERE `id` = 498649 [ RunTime:0.025656s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.071210s ]
  11. SELECT * FROM `article` WHERE `id` < 498649 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.124233s ]
  12. SELECT * FROM `article` WHERE `id` > 498649 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.083941s ]
  13. SELECT * FROM `article` WHERE `id` < 498649 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.164106s ]
  14. SELECT * FROM `article` WHERE `id` < 498649 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001046s ]
  15. SELECT * FROM `article` WHERE `id` < 498649 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.028562s ]
0.747205s