PT-2017-3622 · Linux+1 · Linux Kernel+1

Published 2017-11-29 · Updated 2023-06-21 · CVE-2017-18202

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 4.14.4

Description: The issue is related to the oom reap task mm function in mm/oom kill.c, which mishandles gather operations. This can allow attackers to cause a denial of service, such as a TLB entry leak or use-after-free, or possibly have other unspecified impacts. The exploitation involves triggering a copy to user call within a certain time window.

Recommendations: For Linux kernel versions prior to 4.14.4, update to version 4.14.4 or later to resolve the issue. As a temporary workaround, consider restricting access to the copy to user function to minimize the risk of exploitation.

Fix

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2017-2771

ALT-PU-2017-2789

BDU:2018-00614

CVE-2017-18202

RHSA-2018:2772

Affected Products

Alt Linux

Linux Kernel

References · 17

• https://github.com/torvalds/linux/commit/687cb0884a714ff484d038e9190edc874edcf146 · Patch
• https://access.redhat.com/errata/RHSA-2018:2772 · Vendor Advisory
• https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.4 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2017-18202 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2017-18202 · Security Note
• https://bdu.fstec.ru/vul/2018-00614 · Security Note
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=687cb0884a714ff484d038e9190edc874edcf146 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2017-18202 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-18202 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-18202 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2017-18202 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-18202 · Vendor Advisory
• https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.68 · Note
• https://t.me/cvenotify/52812 · Telegram Post
• http://securityfocus.com/bid/103161 · Note