CVE-2025-61661
Fixed in a distro release EPSS <1%CVSS 4.8
A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading information from a USB device, allowing an attacker to exploit inconsistent length values. A local attacker can connect a maliciously configured USB device during the boot sequence to trigger this issue. A successful exploitation may lead GRUB to crash, leading to a Denial of Service. Data corruption may be also possible, although given the complexity of the exploit the impact is most likely limited.
Products: gnu grub2, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux 2 | grub2 | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-common | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-efi-aa64 | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-efi-aa64-cdboot | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-efi-aa64-ec2 | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-efi-aa64-modules | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-efi-x64 | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-efi-x64-cdboot | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-efi-x64-ec2 | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-efi-x64-modules | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-emu | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-emu-modules | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-pc | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-pc-modules | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-tools | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-tools-efi | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-tools-extra | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2 | grub2-tools-minimal | 1:2.06-14.amzn2.0.7 |
| Amazon Linux 2023 | grub2-common | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-efi-aa64 | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-efi-aa64-cdboot | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-efi-aa64-ec2 | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-efi-aa64-modules | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-efi-x64 | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-efi-x64-cdboot | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-efi-x64-ec2 | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-efi-x64-modules | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-emu | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-emu-modules | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-pc | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-pc-modules | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-tools | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-tools-efi | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-tools-extra | 1:2.06-61.amzn2023.0.21 |
| Amazon Linux 2023 | grub2-tools-minimal | 1:2.06-61.amzn2023.0.21 |
| Debian 12 | grub2 | no fix |
| Debian 13 | grub2 | no fix |
| Debian 14 | grub2 | 2.14-1 |
| SUSE Linux Enterprise Micro 5.2 | grub2 | 2.04-150300.22.61.1 |
| SUSE Linux Enterprise Micro 5.3 | grub2 | 2.06-150400.11.66.1 |
| SUSE Linux Enterprise Micro 5.4 | grub2 | 2.06-150400.11.66.1 |
| SUSE Linux Enterprise Micro 5.5 | grub2 | 2.06-150500.29.59.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | grub2 | 2.12-150600.8.44.2 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | grub2 | 2.12-150700.19.19.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | grub2 | 2.12-150600.8.44.2 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | grub2 | 2.12-150700.19.19.1 |
| SUSE Linux Enterprise Server 16.0 | grub2 | 2.12-160000.3.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | grub2 | 2.02-193.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | grub2 | 2.12-160000.3.1 |
| SUSE Linux Micro 6.1 | grub2 | 2.12-slfo.1.1_3.1 |
| SUSE Linux Micro 6.2 | grub2 | 2.12-160000.3.1 |
| Ubuntu 16.04 LTS | grub2-signed | no fix |
| Ubuntu 16.04 LTS | grub2-unsigned | no fix |
| Ubuntu 18.04 LTS | grub2-signed | no fix |
| Ubuntu 18.04 LTS | grub2-unsigned | no fix |
| Ubuntu 20.04 LTS | grub2-signed | no fix |
| Ubuntu 20.04 LTS | grub2-unsigned | no fix |
| Ubuntu 22.04 LTS | grub2-signed | no fix |
| Ubuntu 22.04 LTS | grub2-unsigned | no fix |
| Ubuntu 24.04 LTS | grub2-signed | no fix |
| Ubuntu 24.04 LTS | grub2-unsigned | no fix |
| Ubuntu 25.10 | grub2-signed | no fix |
| Ubuntu 25.10 | grub2-unsigned | no fix |
| Ubuntu 26.04 LTS | grub2-signed | no fix |
| Ubuntu 26.04 LTS | grub2-unsigned | no fix |
| Ubuntu 26.10 | grub2-signed | no fix |
| Ubuntu 26.10 | grub2-unsigned | no fix |
| Ubuntu Pro 14.04 LTS | grub2 | no fix |
| Ubuntu Pro 14.04 LTS | grub2-signed | no fix |
| openSUSE Leap 15.6 | grub2 | 2.12-150600.8.44.2 |
| openSUSE Leap 16.0 | grub2 | 2.12-160000.3.1 |
| openSUSE Tumbleweed | grub2 | 2.12-67.1 |