# CVE-2025-61663: Grub2: missing unregister call for normal commands may lead to use-after-free CVE-2025-61663 is fixed in 25 products on 1 platform, first by DEBIAN-CVE-2025-61663, released November 18, 2025. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2025-61663 - Priority: Routine - CVSS: 4.9 (Moderate) - EPSS: 0.0014 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Nov 18, 2025 - Weakness: Expired Pointer Dereference - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-61663 ## 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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | grub2 Debian 14 | 2.14-1 | [DEBIAN-CVE-2025-61663](https://patchblox.com/security/data/fix/linux/debian-cve-2025-61663.md) | Nov 18, 2025 | | Linux | grub2 opensuse-leap 15.6 | 2.12-150600.8.44.2 | [SUSE-SU-2025:4196-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4196-1.md) | Nov 24, 2025 | | Linux | grub2 opensuse-leap 16.0 | 2.12-160000.3.1 | [OPENSUSE-SU-2025:20163-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20163-1.md) | Dec 15, 2025 | | Linux | grub2 sles 15.6 | 2.12-150600.8.44.2 | [SUSE-SU-2025:4196-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4196-1.md) | Nov 24, 2025 | | Linux | grub2 sles 15.7 | 2.12-150700.19.19.1 | [SUSE-SU-2025:4305-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4305-1.md) | Nov 28, 2025 | | Linux | grub2 sles 16.0 | 2.12-160000.3.1 | [SUSE-SU-2025:21212-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-21212-1.md) | Dec 15, 2025 | | Linux | grub2-common amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-debugsource amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-efi-aa64 amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-efi-aa64-cdboot amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-efi-aa64-ec2 amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-efi-aa64-modules amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-efi-x64 amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-efi-x64-cdboot amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-efi-x64-ec2 amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-efi-x64-modules amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-emu amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-emu-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-emu-modules amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-pc amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-pc-modules amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-tools amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-tools-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-tools-efi amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-tools-efi-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-tools-extra amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-tools-extra-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-tools-minimal amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | | Linux | grub2-tools-minimal-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.21 | [ALAS2023-2025-1342](https://patchblox.com/security/data/fix/linux/alas2023-2025-1342.md) | Jan 7, 2026 | --- Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.