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Vulnerability · Published Nov 18, 2025 · Assigned by redhat

CVE-2025-61664Grub2: missing unregister call for normal_exit command may lead to use-after-free

Medium 4.9

In plain English

A medium-severity security flaw in grub2 from GNU. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.9Medium
Exploit odds (30 days)0.1%top 95.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A vulnerability in the GRUB2 bootloader has been identified in the normal module. This flaw, a memory Use After Free issue, occurs because the normal_exit command is not properly unregistered when its related module is unloaded. An attacker can exploit this condition by invoking the command after the module has been removed, causing the system to improperly access a previously freed memory location. This leads to a system crash or possible impacts in data confidentiality and integrity.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12grub2no fix listedDEBIAN-CVE-2025-61664
Debian:13grub2no fix listedDEBIAN-CVE-2025-61664
Debian:14grub22.14-1DEBIAN-CVE-2025-61664
Ubuntu:22.04:LTSgrub2-signedno fix listedUBUNTU-CVE-2025-61664
Ubuntu:24.04:LTSgrub2-signedno fix listedUBUNTU-CVE-2025-61664
Ubuntu:25.10grub2-signedno fix listedUBUNTU-CVE-2025-61664
Ubuntu:26.04:LTSgrub2-signedno fix listedUBUNTU-CVE-2025-61664
Ubuntu:26.10grub2-signedno fix listedUBUNTU-CVE-2025-61664
Ubuntu:22.04:LTSgrub2-unsignedno fix listedUBUNTU-CVE-2025-61664
Ubuntu:24.04:LTSgrub2-unsignedno fix listedUBUNTU-CVE-2025-61664
Ubuntu:25.10grub2-unsignedno fix listedUBUNTU-CVE-2025-61664
Ubuntu:26.04:LTSgrub2-unsignedno fix listedUBUNTU-CVE-2025-61664
Ubuntu:26.10grub2-unsignedno fix listedUBUNTU-CVE-2025-61664

Affected products (as reported)

VendorProductVersions
GNU grub2 0 – through 2.14
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references

Weakness: CWE-825 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

References