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).
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T12:40:46.712Z

Reserved: 2018-04-17T00:00:00

Link: CVE-2018-1000200

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-06-05T13:29:00.297

Modified: 2024-11-21T03:39:55.233

Link: CVE-2018-1000200

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-04-24T00:00:00Z

Links: CVE-2018-1000200 - Bugzilla

cve-icon OpenCVE Enrichment

No data.