CVE-2021-20269

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-03-10 · updated 2026-06-17
Weakness: CWE-276

Description

A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47.

Affected products

kexec-tools: before 2.0.21-8; before 2.0.20-47 — fixed in 2.0.20-47, 2.0.21-8

How to fix

Upgrade to a fixed version: kexec-tools 2.0.20-47, 2.0.21-8. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1934261
https://bugzilla.redhat.com/show_bug.cgi?id=1934261

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