CVE-2020-10781

 

Published at: - 16-09-2020 03:15

Last modified: - 26-10-2022 01:44

Total changes: - 4

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=853eab68afc80f59f36bbdeb715e5c88c501e680
• https://www.openwall.com/lists/oss-security/2020/06/18/1
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10781
• [debian-lts-announce] 20200928 [SECURITY] [DLA 2385-1] linux-4.19 security update-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2020-10781

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures