CVE-2022-28735

low-risk

Published 2023-07-20

The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.

Do I need to act?

0.02% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 6.7/10 Medium

LOCAL / LOW complexity

Affected Products (1)

Grub2

Affected Vendors

Gnu

References (6)

Third Party Advisory https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28735

https://security.netapp.com/advisory/ntap-20230825-0002/

Mailing List https://www.openwall.com/lists/oss-security/2022/06/07/5

Third Party Advisory https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28735

https://security.netapp.com/advisory/ntap-20230825-0002/

Mailing List https://www.openwall.com/lists/oss-security/2022/06/07/5

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low-risk

Severity 21/34 · High

Exploitability 0/34 · Minimal

Exposure 5/34 · Minimal