Resource Exhaustion Affecting kernel package, versions <0:4.14.192-147.314.amzn2
Threat Intelligence
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-AMZN2-KERNEL-1683296
- published 27 Sep 2021
- disclosed 16 Sep 2020
Introduced: 16 Sep 2020
CVE-2020-10781 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.192-147.314.amzn2 or higher.
This issue was patched in ALAS2-2020-1480.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
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.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10781
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10781
- 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://lists.debian.org/debian-lts-announce/2020/09/msg00025.html