National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-1000200 Detail

Current 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).

Source:  MITRE
Description Last Modified:  06/05/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.5 MEDIUM
Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 1.8


Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 4.9 MEDIUM
Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:C) (V2 legend)
Impact Subscore: 6.9
Exploitability Subscore: 3.9


Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://seclists.org/oss-sec/2018/q2/67 Mailing List Third Party Advisory
http://www.securityfocus.com/bid/104397 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:2948
https://access.redhat.com/security/cve/cve-2018-1000200 Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=27ae357fa82be5ab73b2ef8d39dcb8ca2563483a Mitigation Patch Vendor Advisory
https://marc.info/?l=linux-kernel&m=152400522806945 Mailing List Third Party Advisory
https://marc.info/?l=linux-kernel&m=152460926619256 Mailing List Third Party Advisory
https://usn.ubuntu.com/3752-1/
https://usn.ubuntu.com/3752-2/
https://usn.ubuntu.com/3752-3/

Technical Details

Vulnerability Type (View All)

  • NULL Pointer Dereference (CWE-476)

Change History

6 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-1000200
NVD Published Date:
06/05/2018
NVD Last Modified:
10/31/2018