CVE-2018-18281

CVE Details

Release Date:

2018-10-30

Description

Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.

See more information about CVE-2018-18281 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	7.8	Base Metrics:	AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Access Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	High
Integrity Impact:	High	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (dtrace-modules-3.8.13-118.46.1.el6uek)	ELSA-2020-5706	2020-06-04
Oracle Linux version 6 (kernel-uek)	ELSA-2020-5706	2020-06-04
Oracle Linux version 6 (kernel-uek)	ELSA-2020-5708	2020-06-03
Oracle Linux version 7 (dtrace-modules-3.8.13-118.46.1.el7uek)	ELSA-2020-5706	2020-06-04
Oracle Linux version 7 (kernel)	ELSA-2019-2029	2019-08-13
Oracle Linux version 7 (kernel-uek)	ELSA-2020-5706	2020-06-04
Oracle Linux version 7 (kernel-uek)	ELSA-2020-5708	2020-06-03
Oracle VM version 3.4 (kernel-uek)	OVMSA-2020-0020	2020-06-05

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team