CVE-2020-10768

Aliases:UBUNTU-CVE-2020-10768DEBIAN-CVE-2020-10768
Advisory lineage Upstream: 0 Downstream: 33
Modified
Published: 15 Sept 2020, 23:13
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
0.4% LOW
0% probability +0.37%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

15 Sept 2020, 23:13
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-rc1 in the prctl() function, where it can be used to enable indirect branch speculation after it has been disabled. This call incorrectly reports it as being 'force disabled' when it is not and opens the system to Spectre v2 attacks. The highest threat from this vulnerability is to confidentiality.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.40%• Percentile: 34%

Techniques & Countermeasures

  • CWE-440•Expected Behavior Violation

    A feature, API, or function does not perform according to its specification.

Affected Systems

  • debian•linux

    < 5.7.6-1 | < 5.7.6-1 | < 5.7.6-1 | < 5.7.6-1

  • ubuntu•linux

    < 4.4.0-186.216 | < 4.15.0-115.116 | < 5.4.0-45.49

  • ubuntu•linux-aws

    < 4.4.0-1075.79 | < 4.4.0-1111.123 | < 4.15.0-1080.84 | < 5.4.0-1022.22

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    < 5.3.0-1032.34~18.04.2

  • 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

    < 5.3.0-1034.35~18.04.1

  • ubuntu•linux-azure-5.4

    < 5.4.0-1023.23~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    all

  • ubuntu•linux-azure-fips

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

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-fips

    < 4.4.0-1043.48 | all | < 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

    < 5.3.0-1032.34~18.04.1

  • 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

    all

  • ubuntu•linux-gke-4.15

    < 4.15.0-1067.70

  • ubuntu•linux-gke-5.0

    < 5.0.0-1045.46

  • ubuntu•linux-gke-5.3

    < 5.3.0-1032.34~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-115.116~16.04.1 | < 5.3.0-64.58~18.04.1

  • 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

    < 4.4.0-1077.84 | < 4.15.0-1072.73 | < 5.4.0-1021.21

  • ubuntu•linux-lts-xenial

    < 4.4.0-186.216~14.04.1

  • ubuntu•linux-oem

    < 4.15.0-1094.104

  • ubuntu•linux-oem-5.6

    < 5.6.0-1020.20

  • ubuntu•linux-oem-osp1

    < 5.0.0-1065.70

  • 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

    < 5.3.0-1030.32~18.04.1

  • 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

    < 4.4.0-1136.145 | < 4.15.0-1068.72 | all

  • ubuntu•linux-raspi2-5.3

    < 5.3.0-1030.32~18.04.2

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    < 5.4.0-31.35 | all

  • ubuntu•linux-snapdragon

    < 4.4.0-1140.148 | < 4.15.0-1084.92

  • linux kernel•kernel

    < 5.8-rc1

  • linux•linux_kernel

    < 5.8.0

References (11)