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CVE-2025-0622: Grub2: command/gpg: use-after-free due to hooks not being removed on module unload

Description

A flaw was found in command/gpg. In some scenarios, hooks created by loaded modules are not removed when the related module is unloaded. This flaw allows an attacker to force grub2 to call the hooks once the module that registered it was unloaded, leading to a use-after-free vulnerability. If correctly exploited, this vulnerability may result in arbitrary code execution, eventually allowing the attacker to bypass secure boot protections.

Classification

CVE ID: CVE-2025-0622

Affected Products

Vendor: Red Hat

Product: Red Hat Enterprise Linux 7

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 7.77% (scored less or equal to compared to others)

EPSS Date: 2025-03-19 (when was this score calculated)

References

https://access.redhat.com/security/cve/CVE-2025-0622
https://bugzilla.redhat.com/show_bug.cgi?id=2345865

Timeline