CVE-2017-1000405

The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmd_mkdirty() in the touch_pmd() function inside the THP implementation. touch_pmd() can be reached by get_user_pages(). In such case, the pmd will become dirty. This scenario breaks the new can_follow_write_pmd()'s logic - pmd can become dirty without going through a COW cycle. This bug is not as severe as the original "Dirty cow" because an ext4 file (or any other regular file) cannot be mapped using THP. Nevertheless, it does allow us to overwrite read-only huge pages. For example, the zero huge page and sealed shmem files can be overwritten (since their mapping can be populated using THP). Note that after the first write page-fault to the zero page, it will be replaced with a new fresh (and zeroed) thp.

• CWE-362

• http://www.securityfocus.com/bid/102032Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1040020Third Party Advisory, VDB Entry
• https://access.redhat.com/errata/RHSA-2018:0180Third Party Advisory
• https://medium.com/bindecy/huge-dirty-cow-cve-2017-1000405-110eca132de0Exploit, Issue Tracking, Third Party Advisory
• https://source.android.com/security/bulletin/pixel/2018-02-01Third Party Advisory
• https://www.exploit-db.com/exploits/43199/Exploit, Issue Tracking, Third Party Advisory, VDB Entry
• http://www.securityfocus.com/bid/102032Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1040020Third Party Advisory, VDB Entry
• https://access.redhat.com/errata/RHSA-2018:0180Third Party Advisory
• https://medium.com/bindecy/huge-dirty-cow-cve-2017-1000405-110eca132de0Exploit, Issue Tracking, Third Party Advisory
• https://source.android.com/security/bulletin/pixel/2018-02-01Third Party Advisory
• https://www.exploit-db.com/exploits/43199/Exploit, Issue Tracking, Third Party Advisory, VDB Entry

Published

Nov 30, 2017

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2017-10004Vulnerability in the Solaris component of Oracle Sun Systems…
• CVE-2017-1000400The Jenkins 2.73.1 and earlier, 2.83 and earlier remote API …
• CVE-2017-1000401The Jenkins 2.73.1 and earlier, 2.83 and earlier default for…
• CVE-2017-1000402Jenkins Swarm Plugin Client 3.4 and earlier bundled a versio…
• CVE-2017-1000403Jenkins Speaks! Plugin, all current versions, allows users w…
• CVE-2017-1000404The Jenkins Delivery Pipeline Plugin version 1.0.7 and earli…
• CVE-2017-1000406OpenDaylight Karaf 0.6.1-Carbon fails to clear the cache aft…
• CVE-2017-1000407The Linux Kernel 2.6.32 and later are affected by a denial o…
• CVE-2017-1000408A memory leak in glibc 2.1.1 (released on May 24, 1999) can …
• CVE-2017-1000409A buffer overflow in glibc 2.5 (released on September 29, 20…
• CVE-2017-1000410The Linux kernel version 3.3-rc1 and later is affected by a …
• CVE-2017-1000411OpenFlow Plugin and OpenDayLight Controller versions Nitroge…