NULL Pointer Dereference Affecting torvalds/linux package, versions [0,]


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.06% (30th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3004690
  • published26 Jan 2022
  • disclosed5 Jun 2018
  • creditUnknown

Introduced: 5 Jun 2018

CVE-2018-1000200  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

There is no fixed version for torvalds/linux.

Overview

Affected versions of this package are vulnerable to NULL Pointer Dereference. 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).

References

CVSS Base Scores

version 3.1