Vulnerability in Linux Kernel
CVE-2020-10781
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.
EPSS: 0.003 (23.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux Linux_kernel — versions 5.8.0
- Linux Kernel — versions before 5.8-rc6
- Debian Debian_linux — versions 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, Vendor Advisory)
- secalert@redhat.com (Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Patch, Mailing List, Third Party Advisory)
- secalert@redhat.com (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-10781?
- CVE-2020-10781 is a medium-severity vulnerability in Linux Kernel, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 5.5/10. Published 2020-09-16.
- How severe is CVE-2020-10781?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-10781 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.