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BootHole is a buffer overflow vulnerability in GRUB2 prior to version 2.06. The flaw is triggered while GRUB2 parses the boot configuration file, grub.cfg. Because Secure Boot validates the signed GRUB2 binary but does not validate the contents of grub.cfg, an attacker who can modify the boot configuration can inject crafted input that overflows a buffer in GRUB2’s configuration parsing logic and achieves arbitrary code execution in the bootloader context. This permits tampering with the GRUB verification process and undermines Secure Boot’s intended trust guarantees during early boot.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The BootHole vulnerability in GRUB 2, referenced here as a prior example of Secure Boot revocation scale and pressure on dbx capacity.
A GRUB2 buffer overflow in grub.cfg parsing that can lead to arbitrary code execution during boot after Secure Boot validation, undermining the boot trust chain.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.