CVE-2020-25668

Aliases:UBUNTU-CVE-2020-25668DEBIAN-CVE-2020-25668
Advisory lineage Upstream: 0 Downstream: 35
Modified
Published: 26 May 2021, 11:11
Last modified:04 Aug 2024, 15:40

Vulnerability Summary

Overall Risk (default)
medium
38/100
CVSS Score
7 HIGH
v3.1 (nvd)
EPSS Score
1.03% LOW
1% probability +0.89%
KEV
Not listed
Ransomware
No reports
Public exploits
2 found
Dark Web
Not detected

Timeline

26 May 2021, 11:11
Published
Vulnerability first disclosed
04 Aug 2024, 15:40
Last Modified
Vulnerability information updated

Description

A flaw was found in Linux Kernel because access to the global variable fg_console is not properly synchronized leading to a use after free in con_font_op.

CVSS Metrics

  • v3.1•HIGH•Score: 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v2.0•MEDIUM•Score: 6.9AV:L/AC:M/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 1.03%• Percentile: 62%

Techniques & Countermeasures

  • CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

    The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

  • CWE-662•Improper Synchronization

    The product utilizes multiple threads, processes, components, or systems to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes.

Affected Systems

  • debian•linux

    < 5.9.6-1 | < 5.9.6-1 | < 5.9.6-1 | < 5.9.6-1

  • ubuntu•linux

    all | < 4.4.0-198.230 | < 4.15.0-129.132 | < 5.4.0-59.65

  • ubuntu•linux-aws

    < 4.4.0-1083.87 | < 4.4.0-1119.133 | < 4.15.0-1091.96 | < 5.4.0-1034.35

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1034.35~18.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2034.35 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1091.96~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1103.114~14.04.1 | < 4.15.0-1103.114~16.04.1 | all | < 5.4.0-1035.36

  • ubuntu•linux-azure-4.15

    < 4.15.0-1103.114

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1035.36~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde-5.15

    < 5.15.0-1114.123~20.04.1

  • ubuntu•linux-azure-fips

    < 4.15.0-2016.18 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-dell300x

    < 4.15.0-1010.14

  • ubuntu•linux-fips

    < 4.4.0-1052.58 | all | < 4.15.0-1049.56

  • ubuntu•linux-gcp

    < 4.15.0-1091.104~16.04.1 | all | < 5.4.0-1033.35

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1091.104

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1033.35~18.04.1

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke-4.15

    < 4.15.0-1077.82

  • ubuntu•linux-gke-5.4

    < 5.4.0-1033.35~18.04.1

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1008.9~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-129.132~16.04.1 | all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-59.65~18.04.1

  • 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

    < 4.4.0-1085.94 | < 4.15.0-1082.84 | < 5.4.0-1031.32

  • ubuntu•linux-lts-xenial

    < 4.4.0-198.230~14.04.1

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.6

    < 5.6.0-1050.54

  • ubuntu•linux-oracle

    < 4.15.0-1062.68~16.04.1 | < 4.15.0-1062.68 | < 5.4.0-1034.36

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1034.36~18.04.1

  • ubuntu•linux-raspi

    < 5.4.0-1026.29

  • ubuntu•linux-raspi-5.4

    < 5.4.0-1026.29~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.4.0-1143.153 | < 4.15.0-1077.82 | all

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    < 5.4.0-40.45

  • ubuntu•linux-riscv-5.8

    < 5.8.0-17.19~20.04.1

  • ubuntu•linux-snapdragon

    < 4.4.0-1147.157 | < 4.15.0-1094.103

  • debian•debian_linux

    9.0

  • linux•linux_kernel

    < 4.4.242 | ≥ 4.5, < 4.9.242 | ≥ 4.10, < 4.14.204 | ≥ 4.15, < 4.19.155 | ≥ 4.20, < 5.4.75 | ≥ 5.5, < 5.9.5

Showing first 50 affected entries in server-rendered view.

References (17)