CVE-2020-26541 Security feature bypass in n/a

What is CVE-2020-26541?

CVE-2020-26541 is a medium-severity vulnerability in Linux kernel, published on 2 Oct 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official 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.

Which versions are affected by CVE-2020-26541?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2020-26541?

Apply the vendor's patch.

Is CVE-2020-26541 being exploited?

There is no known exploitation of CVE-2020-26541 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-26541, GHSA-f823-qm69-5873, UBUNTU-CVE-2020-26541.