CVE-2025-61662: grub2 Use-After-Free — Fix

Description

A Use-After-Free vulnerability has been discovered in GRUB's gettext module. This flaw stems from a programming error where the gettext command remains registered in memory after its module is unloaded. An attacker can exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.

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CVSS v3.1 Score

7.8

HIGH

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

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
gnu	grub2	< 2.14

References

Advisories & Patches

http://www.openwall.com/lists/oss-security/2025/11/18/5

Other References

https://access.redhat.com/errata/RHSA-2026:10097 https://access.redhat.com/errata/RHSA-2026:14773 https://access.redhat.com/errata/RHSA-2026:15087 https://access.redhat.com/errata/RHSA-2026:4648 https://access.redhat.com/errata/RHSA-2026:4649 https://access.redhat.com/errata/RHSA-2026:4652 https://access.redhat.com/errata/RHSA-2026:4653 https://access.redhat.com/errata/RHSA-2026:4654 https://access.redhat.com/errata/RHSA-2026:4760 https://access.redhat.com/errata/RHSA-2026:4822

Frequently Asked Questions

What is CVE-2025-61662? +

A Use-After-Free vulnerability has been discovered in GRUB's gettext module. This flaw stems from a programming error where the gettext command remains registered in memory after its module is unloaded. An attacker can exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-61662? +

CVE-2025-61662 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-61662? +

CVE-2025-61662 affects products from gnu, specifically: grub2. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-61662? +

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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