CVE-2025-61664
CVE-2025-61664 is a medium-severity vulnerability with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-825.
Key facts
- Severity: Medium (CVSS 3.x base score 4.9)
- EPSS exploit prediction: 0% (4th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-198079
- Weakness: CWE-825
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2025-61664?
- 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.
- How severe is CVE-2025-61664?
- CVE-2025-61664 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2025-61664 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-61664?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-61664 have an EU (EUVD) identifier?
- Yes. CVE-2025-61664 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198079.
- When was CVE-2025-61664 published?
- CVE-2025-61664 was published on 2025-11-18 and last updated on 2026-08-21.
References
- https://access.redhat.com/security/cve/CVE-2025-61664
- https://bugzilla.redhat.com/show_bug.cgi?id=2414685
- https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html
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