CVEvulnerability

CVE-2018-1000200

5.5 MEDIUM Published 2018-06-05 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-06-05
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
5.5 MEDIUM — CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
4.9 MEDIUM — AV:L/AC:L/Au:N/C:N/I:N/A:C
Weaknesses
CWE-476

Description

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).

Affected configurations

• linux linux kernel 4.14 • linux linux kernel 4.15 • linux linux kernel 4.16

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References