CVE-2021-33656

Aliases:UBUNTU-CVE-2021-33656DEBIAN-CVE-2021-33656USN-5591-1USN-5591-2USN-5591-3USN-5591-4USN-5597-1USN-5598-1
Advisory lineage Upstream: 1 Downstream: 35
Modified
Published: 18 Jul 2022, 14:44
Last modified:03 Aug 2024, 23:58

Vulnerability Summary

Overall Risk (default)
medium
27/100
CVSS Score
6.8 MEDIUM
v3.1 (nvd)
EPSS Score
0.61% LOW
1% probability +0.58%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

18 Jul 2022, 14:44
Published
Vulnerability first disclosed
03 Aug 2024, 23:58
Last Modified
Vulnerability information updated

Description

When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.

CVSS Metrics

  • v4.0•HIGH•Score: 7.3CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  • v3.1•MEDIUM•Score: 6.8CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.61%• Percentile: 48%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • debian•linux

    < 5.10.127-1 | < 5.14.6-1 | < 5.14.6-1 | < 5.14.6-1

  • ubuntu•linux

    all | < 4.4.0-234.268 | < 5.4.0-125.141 | < 4.15.0-192.203

  • ubuntu•linux-aws

    < 4.4.0-1113.119 | < 4.4.0-1150.165 | < 5.4.0-1084.91 | < 4.15.0-1140.151

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1084.91~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-fips

    < 4.15.0-2079.84 | all | < 5.4.0-1085.92+fips1

  • ubuntu•linux-aws-hwe

    < 4.15.0-1140.151~16.04.1

  • ubuntu•linux-azure

    all | < 5.4.0-1090.95 | < 4.15.0-1150.165~14.04.1 | < 4.15.0-1150.165~16.04.1

  • ubuntu•linux-azure-4.15

    < 4.15.0-1150.165

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1090.95~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde-5.15

    < 5.15.0-1114.123~20.04.1

  • ubuntu•linux-azure-fips

    < 4.15.0-2060.66 | all | < 5.4.0-1090.95+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1045.50

  • ubuntu•linux-dell300x

    < 4.15.0-1052.57

  • ubuntu•linux-fips

    < 4.4.0-1083.90 | all | < 4.15.0-1097.108 | < 5.4.0-1060.68

  • ubuntu•linux-gcp

    all | < 5.4.0-1087.95 | < 4.15.0-1135.151~16.04.2

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1135.151

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.13

    all

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1087.95~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-fips

    < 4.15.0-2044.49 | all | < 5.4.0-1087.95+fips1

  • ubuntu•linux-gke

    < 5.4.0-1081.87

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.4

    all

  • ubuntu•linux-gkeop

    < 5.4.0-1052.55

  • ubuntu•linux-gkeop-5.4

    all

  • ubuntu•linux-hwe

    all | < 4.15.0-192.203~16.04.1

  • ubuntu•linux-hwe-5.11

    all

  • ubuntu•linux-hwe-5.13

    all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-125.141~18.04.1

  • ubuntu•linux-hwe-5.8

    all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-ibm

    < 5.4.0-1032.36

  • ubuntu•linux-ibm-5.4

    < 5.4.0-1032.36~18.04.1

  • ubuntu•linux-intel-5.13

    all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-iot

    < 5.4.0-1004.6

  • ubuntu•linux-kvm

    < 4.4.0-1114.124 | < 5.4.0-1074.79 | < 4.15.0-1126.131

  • ubuntu•linux-lts-xenial

    < 4.4.0-234.268~14.04.1

Showing first 50 affected entries in server-rendered view.

References (21)