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
CVSS v3 Base Score
See breakdown
Affected Packages
Platform | Package | Release Date | Advisory | Status |
---|---|---|---|---|
Amazon Linux 2 - Core | kernel | 2020-08-18 | ALAS2-2020-1480 | Fixed |
Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2022-01-20 | ALAS2KERNEL-5.4-2022-014 | Fixed |
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 |