Is CVE-2025-61663 in the CISA KEV catalog?

No. CVE-2025-61663 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-61663?

CVE-2025-61663 has a CVSS v3 base score of 4.9 (MEDIUM).

What is the EPSS score for CVE-2025-61663?

CVE-2025-61663 has an EPSS score of 0.11% (2th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-61663?

Upgrade grub2 on debian unstable to 2.14-1 or later.

CVE & CISA-KEV Catalog

CVE-2025-61663

MEDIUM

4.9

CVSS v3

NVD

Description

A vulnerability has been identified in the GRUB2 bootloader's normal command that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the normal command is not properly unregistered when the module is unloaded. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability. Impact on the data integrity and confidentiality is also not discarded.

CWE-825

How to fix

Remediation Available

grub2Debian

Fixed in:2.14-1CVE-2025-61663

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.11%probability of exploitation in 30 days

2ndpercentile

Low risk: more likely to be exploited than 2% of all known CVEs.

References

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-30.