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CVE-2018-18281

Description

Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.

POC

Reference

- http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html

Github

- https://github.com/ARPSyndicate/cvemon

- https://github.com/jiayy/android_vuln_poc-exp

- https://github.com/kdn111/linux-kernel-exploitation

- https://github.com/khanhdn111/linux-kernel-exploitation

- https://github.com/khanhdz-06/linux-kernel-exploitation

- https://github.com/khanhdz191/linux-kernel-exploitation

- https://github.com/khanhhdz/linux-kernel-exploitation

- https://github.com/khanhhdz06/linux-kernel-exploitation

- https://github.com/khanhnd123/linux-kernel-exploitation

- https://github.com/khnhdz/linux-kernel-exploitation

- https://github.com/knd06/linux-kernel-exploitation

- https://github.com/ndk06/linux-kernel-exploitation

- https://github.com/ndk191/linux-kernel-exploitation

- https://github.com/ssr-111/linux-kernel-exploitation

- https://github.com/wkhnh06/linux-kernel-exploitation

- https://github.com/xairy/linux-kernel-exploitation