CVE-2020-27830

Aliases:UBUNTU-CVE-2020-27830DEBIAN-CVE-2020-27830
Advisory lineage Upstream: 0 Downstream: 15
Modified
Published: 13 May 2021, 14:15
Last modified:04 Aug 2024, 16:25

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.3% LOW
0% probability +0.16%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

13 May 2021, 14:15
Published
Vulnerability first disclosed
04 Aug 2024, 16:25
Last Modified
Vulnerability information updated

Description

A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.

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•LOW•Score: 2.1AV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.30%• Percentile: 23%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • debian•linux

    < 5.9.15-1 | < 5.9.15-1 | < 5.9.15-1 | < 5.9.15-1

  • ubuntu•linux

    < 4.15.0-136.140 | < 5.4.0-66.74

  • ubuntu•linux-aws

    < 4.15.0-1094.101 | < 5.4.0-1038.40

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1038.40~18.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2037.39 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1094.101~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1108.120~14.04.1 | < 4.15.0-1108.120~16.04.1 | all | < 5.4.0-1040.42

  • ubuntu•linux-azure-4.15

    < 4.15.0-1108.120

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1040.42~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2020.23 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-dell300x

    < 4.15.0-1012.16

  • ubuntu•linux-fips

    < 4.15.0-1053.61 | all

  • ubuntu•linux-gcp

    < 4.15.0-1093.106~16.04.1 | all | < 5.4.0-1037.40

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1093.106

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1037.40~18.04.1

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke

    < 5.4.0-1036.38

  • ubuntu•linux-gke-4.15

    < 4.15.0-1079.84

  • ubuntu•linux-gke-5.4

    < 5.4.0-1036.38~18.04.1

  • ubuntu•linux-gkeop

    < 5.4.0-1010.11

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1010.11~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-136.140~16.04.1 | all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-66.74~18.04.2

  • ubuntu•linux-hwe-5.8

    < 5.8.0-44.50~20.04.1

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.15.0-1085.87 | < 5.4.0-1033.34

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.6

    < 5.6.0-1053.57

  • ubuntu•linux-oracle

    < 4.15.0-1065.73~16.04.1 | < 4.15.0-1065.73 | < 5.4.0-1038.41

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1038.41~18.04.1

  • ubuntu•linux-raspi

    < 5.4.0-1029.32

  • ubuntu•linux-raspi-5.4

    < 5.4.0-1029.32~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.15.0-1079.84 | all

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    all

  • ubuntu•linux-riscv-5.8

    < 5.8.0-17.19~20.04.1

  • ubuntu•linux-snapdragon

    < 4.15.0-1096.105

  • debian•debian_linux

    9.0 | 10.0

  • linux•linux_kernel

    < 5.9.14

References (15)