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prionPRIOn knowledge basePRION:CVE-2018-1000200
HistoryJun 05, 2018 - 1:29 p.m.

Null pointer dereference

2018-06-0513:29:00
PRIOn knowledge base
www.prio-n.com
10

AI Score

6.3

Confidence

High

EPSS

0.001

Percentile

26.7%

The Linux Kernel versions 4.14, 4.15, and 4.16 has a null pointer dereference which can result in an out of memory (OOM) killing of large mlocked processes. The issue arises from an oom killed process’s final thread calling exit_mmap(), which calls munlock_vma_pages_all() for mlocked vmas.This can happen synchronously with the oom reaper’s unmap_page_range() since the vma’s VM_LOCKED bit is cleared before munlocking (to determine if any other vmas share the memory and are mlocked).

AI Score

6.3

Confidence

High

EPSS

0.001

Percentile

26.7%