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Rewterz Threat Advisory – CVE-2022-21505 – Linux Kernel Lockdown feature Vulnerability

Severity

Medium

Analysis Summary

CVE-2022-21505

Linux Kernel could allow a local authenticated attacker to bypass security restrictions, caused by a flaw when Secure Boot is disabled or unavailable. By sending a specially-crafted request to add ima_appraise=log to the kernel command line, an attacker could exploit this vulnerability to bypass the Lockdown protection feature.

Impact

  • Security Bypass

Indicators Of Compromise

CVE

  • CVE-2022-21505

Affected Vendors

Linux

Affected Products

  • Linux Kernel

Remediation

Refer to Linux Kernel Website for patch, upgrade or suggested workaround information.

Linux Kernel Website