CVE-2020-26541

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-10-02 · updated 2026-06-17

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.

Affected products

Linux kernel: through 5.8.13

References

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

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