CVE-2025-0622: Use-After-Free (CVSS 6.4)

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.

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CVSS v3.1 Score

6.4

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-416 Use After Free

References

Other References

https://access.redhat.com/errata/RHSA-2025:16154 https://access.redhat.com/errata/RHSA-2025:6990 https://access.redhat.com/security/cve/CVE-2025-0622 https://bugzilla.redhat.com/show_bug.cgi?id=2345865 https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html

Frequently Asked Questions

What is CVE-2025-0622? +

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. It has a CVSS v3.1 base score of 6.4 (MEDIUM).

How severe is CVE-2025-0622? +

CVE-2025-0622 has a CVSS v3.1 score of 6.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-0622? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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