CVE-2020-26541

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. This affects certs/blacklist.c and certs/system_keyring.c.

References

https://lkml.org/lkml/2020/9/15/1871

Details

Source: MITRE

Published: 2020-10-02

Updated: 2020-10-05

Risk Information

CVSS v2

Base Score: 6.9

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 0.6

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to 5.8.13 (inclusive)

Tenable Plugins

View all (9 total)

IDNameProductFamilySeverity
153174Ubuntu 20.04 LTS / 21.04 : Linux kernel vulnerabilities (USN-5070-1)NessusUbuntu Local Security Checks
high
151857RHEL 8 : kernel (RHSA-2021:2718)NessusRed Hat Local Security Checks
high
151856RHEL 8 : kernel-rt (RHSA-2021:2719)NessusRed Hat Local Security Checks
high
151454RHEL 8 : kernel (RHSA-2021:2666)NessusRed Hat Local Security Checks
medium
151365CentOS 8 : kernel (CESA-2021:2570)NessusCentOS Local Security Checks
medium
151218Oracle Linux 8 : kernel (ELSA-2021-2570)NessusOracle Linux Local Security Checks
medium
151138RHEL 8 : kernel (RHSA-2021:2570)NessusRed Hat Local Security Checks
medium
151137RHEL 8 : kernel-rt (RHSA-2021:2599)NessusRed Hat Local Security Checks
medium
142483Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2020-5912)NessusOracle Linux Local Security Checks
high