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Dirty Frag: Linux 内核页缓存污染通用本地提权深度解析

2026-06-29 15:02:00

Dirty Frag: Linux 内核页缓存污染通用本地提权深度解析

# 一键缓解命令sh -c "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"

参考来源

官方 GitHub（PoC + write-up）: https://github.com/V4bel/dirtyfrag

详细技术分析: https://github.com/V4bel/dirtyfrag/blob/master/assets/write-up.md

oss-security 披露: https://www.openwall.com/lists/oss-security/2026/05/07/8

LWN 报道: https://lwn.net/Articles/1071719/

Phoronix: https://www.phoronix.com/news/Dirty-Frag-Linux

Tom's Hardware: https://www.tomshardware.com/tech-industry/cyber-security/dirty-frag-exploit-gets-root-on-most-linux-machines-since-2017-no-patches-available-no-warning-given-copy-fail-like-vulnerability-had-its-embargo-broken

ESP 补丁: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=f4c50a4034e62ab75f1d5cdd191dd5f9c77fdff4

RxRPC 补丁讨论: https://lore.kernel.org/all/afKV2zGR6rrelPC7@v4bel/

奇安信 CERT: 【已复现】Linux Kernel Dirty Frag 本地权限提升漏洞(QVD-2026-24699)安全风险通告

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CONNECT:[ UseTime:0.000509s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000589s ]
SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.021235s ]
SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000308s ]
SHOW FULL COLUMNS FROM `set` [ RunTime:0.000576s ]
SELECT * FROM `set` [ RunTime:0.003197s ]
SHOW FULL COLUMNS FROM `article` [ RunTime:0.000617s ]
SELECT * FROM `article` WHERE `id` = 492241 LIMIT 1 [ RunTime:0.026117s ]
UPDATE `article` SET `lasttime` = 1783072774 WHERE `id` = 492241 [ RunTime:0.010822s ]
SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000961s ]
SELECT * FROM `article` WHERE `id` < 492241 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.006943s ]
SELECT * FROM `article` WHERE `id` > 492241 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002110s ]
SELECT * FROM `article` WHERE `id` < 492241 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.014794s ]
SELECT * FROM `article` WHERE `id` < 492241 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.019775s ]
SELECT * FROM `article` WHERE `id` < 492241 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006042s ]

0.183585s

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