PT-2018-6748 · Linux+3 · Linux Kernel+3

Published 2017-07-12 · Updated 2018-07-09 · CVE-2017-18221

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 4.11.4

Description: The issue allows local users to cause a denial of service due to NR MLOCK accounting corruption. This can be achieved through crafted use of mlockall and munlockall system calls. The munlock pagevec function in mm/mlock.c is involved in this issue.

Recommendations: For Linux kernel versions prior to 4.11.4, update to version 4.11.4 or later to resolve the issue.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALT-PU-2017-1854

ALT-PU-2018-1991

CVE-2017-18221

SUSE-SU-2018:0834-1

SUSE-SU-2018:0848-1

USN-3655-1

USN-3655-2

Affected Products

Alt Linux

Linux Kernel

Suse

Ubuntu

References · 86

• https://github.com/torvalds/linux/commit/70feee0e1ef331b22cc51f383d532a0d043fbdcc · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-18221 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2019-4315.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-18079 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-3639 · Vendor Advisory
• https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.4 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2017-18221 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2017-18221 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3655-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-18208 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-18221 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2017-18221 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-12134 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-18221 · Security Note
• https://usn.ubuntu.com/3655-2 · Vendor Advisory