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Linux Distros Unpatched Vulnerability : CVE-2025-61663

medium Nessus Plugin ID 275739

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - 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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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. (CVE-2025-61663)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2025-61663

https://security-tracker.debian.org/tracker/CVE-2025-61663

https://ubuntu.com/security/CVE-2025-61663

Plugin Details

Severity: Medium

ID: 275739

File Name: unpatched_CVE_2025_61663.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 11/18/2025

Updated: 11/19/2025

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.8

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:C/A:P

CVSS Score Source: CVE-2025-61663

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5.1

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:grub2-ppc-modules, p-cpe:/a:debian:debian_linux:grub2, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:centos:centos:grub2-efi-ia32, p-cpe:/a:centos:centos:grub2-ppc64le-modules, cpe:/o:centos:centos:8, p-cpe:/a:canonical:ubuntu_linux:grub2-signed, p-cpe:/a:centos:centos:grub2-pc, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:centos:centos:grub2-efi-aa64, p-cpe:/a:centos:centos:grub2-efi-x64-cdboot, p-cpe:/a:centos:centos:grub2-tools-efi, p-cpe:/a:centos:centos:grub2-efi-x64-modules, p-cpe:/a:redhat:enterprise_linux:grub2-pc-modules, p-cpe:/a:redhat:enterprise_linux:grub2-efi-modules, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:redhat:enterprise_linux:grub2-tools-extra, p-cpe:/a:centos:centos:grub2-tools-minimal, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:grub2-tools, p-cpe:/a:centos:centos:grub2-ppc64, p-cpe:/a:centos:centos:grub2-efi-aa64-modules, p-cpe:/a:redhat:enterprise_linux:grub2-efi-aa64-cdboot, p-cpe:/a:redhat:enterprise_linux:grub2-efi, p-cpe:/a:centos:centos:grub2-efi, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:centos:centos:grub2-efi-ia32-cdboot, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:grub2-common, p-cpe:/a:centos:centos:grub2-ppc-modules, p-cpe:/a:centos:centos:grub2-ppc64le, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:centos:centos:grub2-tools-extra, p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32, p-cpe:/a:redhat:enterprise_linux:grub2-ppc64le, p-cpe:/a:centos:centos:grub2-ppc64-modules, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:centos:centos:grub2, cpe:/o:canonical:ubuntu_linux:25.04, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:grub2-ppc64le-modules, p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64-cdboot, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:grub2-tools-minimal, p-cpe:/a:centos:centos:grub2-efi-ia32-modules, p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64, p-cpe:/a:centos:centos:grub2-efi-x64, p-cpe:/a:centos:centos:grub2-efi-modules, p-cpe:/a:redhat:enterprise_linux:grub2-ppc64, p-cpe:/a:canonical:ubuntu_linux:grub2, p-cpe:/a:redhat:enterprise_linux:grub2-tools, p-cpe:/a:centos:centos:grub2-efi-aa64-cdboot, p-cpe:/a:redhat:enterprise_linux:grub2-efi-aa64, p-cpe:/a:redhat:enterprise_linux:grub2-ppc64-modules, p-cpe:/a:redhat:enterprise_linux:grub2-pc, p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64-modules, p-cpe:/a:redhat:enterprise_linux:grub2-efi-aa64-modules, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:redhat:enterprise_linux:grub2, p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32-cdboot, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:centos:centos:grub2-common, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32-modules, p-cpe:/a:centos:centos:grub2-pc-modules, p-cpe:/a:redhat:enterprise_linux:grub2-tools-efi, p-cpe:/a:canonical:ubuntu_linux:grub2-unsigned

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 11/18/2025

Reference Information

CVE: CVE-2025-61663