CVE-2020-10781MEDIUM
New! CVE Severity Now Using CVSS v3
The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
Description
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
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
Details
Source: MITRE
Published: 2020-09-16
Updated: 2020-09-28
Type: CWE-400
Risk Information
CVSS v2
Base Score: 4.9
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 3.9
Severity: MEDIUM
CVSS v3
Base Score: 5.5
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 1.8
Severity: MEDIUM
Vulnerable Software
Configuration 1
OR
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.8.0:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.8.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.8.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.8.0:rc3:*:*:*:*:*:*
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 147512 | EulerOS Virtualization 2.9.1 : kernel (EulerOS-SA-2021-1604) | Nessus | Huawei Local Security Checks | high |
| 146474 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0438-1) | Nessus | SuSE Local Security Checks | high |
| 146282 | openSUSE Security Update : RT kernel (openSUSE-2021-242) | Nessus | SuSE Local Security Checks | high |
| 144244 | EulerOS 2.0 SP5 : kernel (EulerOS-SA-2020-2549) | Nessus | Huawei Local Security Checks | high |
| 141396 | Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2020-5885) | Nessus | Oracle Linux Local Security Checks | high |
| 140933 | Debian DLA-2385-1 : linux-4.19 security update | Nessus | Debian Local Security Checks | high |
| 140588 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2020-5848) | Nessus | Oracle Linux Local Security Checks | medium |
| 140500 | Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2020-5844) | Nessus | Oracle Linux Local Security Checks | medium |
| 140499 | Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2020-5845) | Nessus | Oracle Linux Local Security Checks | critical |
| 140378 | SUSE SLES15 Security Update : kernel (SUSE-SU-2020:2487-1) | Nessus | SuSE Local Security Checks | medium |
| 140328 | EulerOS Virtualization for ARM 64 3.0.2.0 : kernel (EulerOS-SA-2020-1958) | Nessus | Huawei Local Security Checks | high |
| 140183 | Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4485-1) | Nessus | Ubuntu Local Security Checks | high |
| 140181 | Ubuntu 18.04 LTS / 20.04 : Linux kernel vulnerabilities (USN-4483-1) | Nessus | Ubuntu Local Security Checks | high |
| 139995 | EulerOS Virtualization for ARM 64 3.0.6.0 : kernel (EulerOS-SA-2020-1892) | Nessus | Huawei Local Security Checks | high |
| 139858 | Amazon Linux 2 : kernel (ALAS-2020-1480) | Nessus | Amazon Linux Local Security Checks | medium |
| 139766 | openSUSE Security Update : the Linux Kernel (openSUSE-2020-1236) | Nessus | SuSE Local Security Checks | medium |
| 139401 | openSUSE Security Update : the Linux Kernel (openSUSE-2020-1153) | Nessus | SuSE Local Security Checks | critical |
| 139363 | SUSE SLES12 Security Update : kernel (SUSE-SU-2020:2122-1) | Nessus | SuSE Local Security Checks | critical |
| 139361 | SUSE SLES12 Security Update : kernel (SUSE-SU-2020:2119-1) | Nessus | SuSE Local Security Checks | critical |
| 139310 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:2107-1) | Nessus | SuSE Local Security Checks | critical |
| 139308 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:2105-1) | Nessus | SuSE Local Security Checks | medium |
| 139137 | EulerOS 2.0 SP8 : kernel (EulerOS-SA-2020-1807) | Nessus | Huawei Local Security Checks | high |