CVE-2020-10781
mediumpriority · track · 22EPSS 0.003 · 24 %ileEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (14)
Products and version ranges known to be affected.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (24)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2020-10781cnnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10781cnnvd
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=853eab68afc80f59f36bbdeb715e5c88c501e680cnnvd
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.htmlcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-10781cnnvd
- https://packetstormsecurity.com/files/159044/Ubuntu-Security-Notice-USN-4485-1.htmlcnnvd
- https://vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-Zram-Sysfs-32567cnnvd
- https://www.auscert.org.au/bulletins/ESB-2020.2642/cnnvd
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