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CVE-2020-10781

Public on 2020-08-18
Modified on 2020-08-24
Description

A flaw was found 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.

Severity
Low
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CVSS v3 Base Score
5.5
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core kernel 2020-08-18 20:29 ALAS2-2020-1480
Amazon Linux 2 - Kernel-5.4 Extra kernel 2022-01-20 19:25 ALAS2KERNEL-5.4-2022-014

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD CVSSv2 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C
NVD CVSSv3 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Red Hat: CVE-2020-10781 Mitre: CVE-2020-10781 FAQs regarding Amazon Linux ALAS/CVE Severity