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.
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Score 6.7 from GitHub Security Advisory (severity: HIGH) published 2023-07-20. NVD baseline CVSS 6.7; sources differ by 0.0.
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.
July 20, 2023
November 21, 2024
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | shim-signed (1.51.3+15.7-0ubuntu1) @ jammy | 2026-05-23 | ubuntu |
| redhat | grub2-1:2.02-123.el8_6.8 | 2022-06-16 | redhat |
| redhat | grub2-1:2.02-87.el8_1.10 | 2022-06-16 | redhat |
| redhat | grub2-1:2.02-87.el8_2.10 | 2022-06-16 | redhat |
| redhat | grub2-1:2.02-99.el8_4.9 | 2022-06-16 | redhat |
| redhat | grub2-1:2.06-27.el9_0.7 | 2022-06-16 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
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.
RHSA-2022:5095 — Moderate
RHSA-2022:5096 — Moderate
RHSA-2022:5098 — Moderate
RHSA-2022:5099 — Moderate
RHSA-2022:5100 — Moderate
GRUB2 vulnerabilities
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Explore the affected products and dependency analysis for CVE-2022-28735
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