CVE-2020-10781

CVE Details

Release Date:	2020-09-16
Impact:	None	What is this?

Description

A flaw was found in the Linux Kernel before 5.8-rc6 in the ZRAM kernel module, where a user with a local account and the ability to read the /sys/class/zram-control/hot_add file can create ZRAM device nodes in the /dev/ directory. This read allocates kernel memory and is not accounted for a user that triggers the creation of that ZRAM device. With this vulnerability, continually reading the device may consume a large amount of system memory and cause the Out-of-Memory (OOM) killer to activate and terminate random userspace processes, possibly making the system inoperable.

See more information about CVE-2020-10781 from MITRE CVE dictionary and NIST NVD

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

CVSS v3 metrics

Base Score:	5.5
Vector String:	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Version:	3.0
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel-uek)	ELSA-2020-5844	2020-09-11
Oracle Linux version 7 (kernel-uek)	ELSA-2020-5845	2020-09-11
Oracle Linux version 7 (kernel-uek)	ELSA-2020-5848	2020-09-14
Oracle Linux version 7 (kernel-uek)	ELSA-2020-5885	2020-10-12
Oracle Linux version 8 (kernel-uek)	ELSA-2020-5848	2020-09-14