CVE-2020-10781

Aliases:UBUNTU-CVE-2020-10781DEBIAN-CVE-2020-10781
Advisory lineage Upstream: 0 Downstream: 18
Modified
Published: 16 Sept 2020, 00:00
Last modified:04 Aug 2024, 11:14

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (cve.org)
EPSS Score
0.31% LOW
0% probability +0.21%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

16 Sept 2020, 00:00
Published
Vulnerability first disclosed
04 Aug 2024, 11:14
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 4.9AV:L/AC:L/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 0.31%• Percentile: 24%

Techniques & Countermeasures

  • CWE-732•Incorrect Permission Assignment for Critical Resource

    The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Affected Systems

  • debian•linux

    < 5.7.10-1 | < 5.7.10-1 | < 5.7.10-1 | < 5.7.10-1

  • ubuntu•linux

    < 4.15.0-115.116 | < 5.4.0-45.49

  • ubuntu•linux-aws

    < 4.15.0-1080.84 | < 5.4.0-1022.22

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1022.22~18.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2025.25 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1080.84~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1093.103~14.04.1 | < 4.15.0-1093.103~16.04.1 | all | < 5.4.0-1023.23

  • ubuntu•linux-azure-4.15

    < 4.15.0-1093.103

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1023.23~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2007.8 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-fips

    < 4.15.0-1039.44

  • ubuntu•linux-gcp

    < 4.15.0-1081.92~16.04.1 | all | < 5.4.0-1022.22

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1081.92

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1022.22~18.04.1

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke-4.15

    < 4.15.0-1067.70

  • ubuntu•linux-hwe

    < 4.15.0-115.116~16.04.1 | all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-45.49~18.04.2

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.15.0-1072.73 | < 5.4.0-1021.21

  • ubuntu•linux-oem

    < 4.15.0-1094.104

  • ubuntu•linux-oem-5.6

    < 5.6.0-1053.57

  • ubuntu•linux-oracle

    < 4.15.0-1051.55~16.04.1 | < 4.15.0-1051.55 | < 5.4.0-1022.22

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1022.22~18.04.1

  • ubuntu•linux-raspi

    < 5.4.0-1016.17

  • ubuntu•linux-raspi-5.4

    < 5.4.0-1016.17~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.15.0-1068.72 | all

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    < 5.4.0-31.35

  • ubuntu•linux-snapdragon

    < 4.15.0-1084.92

  • debian•debian_linux

    9.0

  • linux kernel•kernel

    < 5.8-rc6

  • linux•linux_kernel

    < 5.8.0 | 5.8.0 | 5.8.0:rc1 | 5.8.0:rc2 | 5.8.0:rc3 | 5.8.0:rc4 | 5.8.0:rc5

References (10)