CVE-2020-27820

Aliases:UBUNTU-CVE-2020-27820DEBIAN-CVE-2020-27820
Advisory lineage Upstream: 0 Downstream: 25
Modified
Published: 02 Nov 2021, 23:26
Last modified:04 Aug 2024, 16:25

Vulnerability Summary

Overall Risk (default)
low
19/100
CVSS Score
4.7 MEDIUM
v3.1 (nvd)
EPSS Score
0.5% LOW
1% probability +0.48%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

02 Nov 2021, 23:26
Published
Vulnerability first disclosed
04 Aug 2024, 16:25
Last Modified
Vulnerability information updated

Description

A vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could happen if removing device (that is not common to remove video card physically without power-off, but same happens if "unbind" the driver).

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 4.7AV:L/AC:M/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 0.50%• Percentile: 42%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • debian•linux

    < 5.10.84-1 | < 5.15.5-1 | < 5.15.5-1 | < 5.15.5-1

  • ubuntu•linux

    all | < 4.4.0-224.257 | < 5.4.0-110.124

  • ubuntu•linux-aws

    < 4.4.0-1104.109 | < 4.4.0-1140.154 | all | < 5.4.0-1073.78

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    < 5.11.0-1028.31~20.04.1

  • ubuntu•linux-aws-5.13

    < 5.13.0-1012.13~20.04.1

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1075.80~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-fips

    all | < 5.4.0-1073.78+fips1

  • ubuntu•linux-aws-hwe

    all

  • ubuntu•linux-azure

    all | all | < 5.4.0-1078.81

  • ubuntu•linux-azure-4.15

    all

  • ubuntu•linux-azure-5.11

    < 5.11.0-1028.31~20.04.2

  • ubuntu•linux-azure-5.13

    < 5.13.0-1013.15~20.04.1

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1078.81~18.04.1

  • 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

    all | < 5.4.0-1078.81+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1040.44

  • ubuntu•linux-fips

    < 4.4.0-1074.80 | all | < 5.4.0-1049.55

  • ubuntu•linux-gcp

    all | all | < 5.4.0-1073.78

  • ubuntu•linux-gcp-4.15

    all

  • ubuntu•linux-gcp-5.11

    < 5.11.0-1029.33~20.04.3

  • ubuntu•linux-gcp-5.13

    < 5.13.0-1013.16~20.04.1

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1073.78~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all | < 5.4.0-1073.78+fips1

  • ubuntu•linux-gke

    < 5.4.0-1071.76

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.4

    < 5.4.0-1071.76~18.04.3

  • ubuntu•linux-gkeop

    < 5.4.0-1040.41

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1040.41~18.04.1

  • ubuntu•linux-hwe

    all | all

  • ubuntu•linux-hwe-5.11

    all

  • ubuntu•linux-hwe-5.13

    < 5.13.0-28.31~20.04.1

  • ubuntu•linux-hwe-5.4

    < 5.4.0-110.124~18.04.1

  • ubuntu•linux-hwe-5.8

    all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-ibm

    < 5.4.0-1021.23

  • ubuntu•linux-ibm-5.4

    < 5.4.0-1021.23~18.04.1

  • ubuntu•linux-intel-5.13

    all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-iot

    < 5.4.0-1004.6

  • ubuntu•linux-kvm

    < 4.4.0-1105.114 | all | < 5.4.0-1063.66

  • ubuntu•linux-lts-xenial

    < 4.4.0-224.257~14.04.1

Showing first 50 affected entries in server-rendered view.

References (13)