CVE-2018-1000200

MEDIUM

Linux Kernel 4.14-4.16 - Use After Free

Title source: llm
STIX 2.1

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).

References (10)

Core 10
Core References
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3752-3/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3752-2/
Third Party Advisory x_refsource_confirm
https://access.redhat.com/security/cve/cve-2018-1000200
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://marc.info/?l=linux-kernel&m=152460926619256
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:2948
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/104397
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://marc.info/?l=linux-kernel&m=152400522806945
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3752-1/
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://seclists.org/oss-sec/2018/q2/67

Scores

CVSS v3 5.5
EPSS 0.0049
EPSS Percentile 38.6%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (3)
linux/linux_kernel 4.14
linux/linux_kernel 4.15
linux/linux_kernel 4.16
Published Jun 05, 2018
Tracked Since Feb 18, 2026