Out-of-bounds write in grub - CVE-2025-61661

Vulnerability identifier: #VU118663

CSH Severity: Low

CVSS v4: 5.2 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-61661

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows an attacker to perform a denial of service attack.

The vulnerability exists due to a boundary error within the grub_usb_get_string() function in grub-core/commands/usbtest.c. An attacker with physical access to the system can connect a specially crafted USB device during the boot sequence, trigger an out-of-bounds write and perform a denial of service (DoS) attack.

grub
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Server Applications Module
Basesystem Module
openSUSE Leap
openEuler
Anolis OS
grub2-x86_64-efi
grub2-debugsource
grub2
grub2-i386-pc
grub2-debuginfo
grub2-x86_64-xen
grub2-systemd-sleep-plugin
grub2-snapper-plugin
grub2-branding-upstream
grub2-arm64-efi-debug
grub2-x86_64-efi-extras
grub2-arm64-efi
grub2-i386-xen-extras
grub2-arm64-efi-extras
grub2-i386-pc-debug
grub2-s390x-emu-debug
grub2-s390x-emu
grub2-powerpc-ieee1275-extras
grub2-x86_64-efi-debug
grub2-powerpc-ieee1275-debug
grub2-i386-xen
grub2-i386-efi-debug
grub2-i386-pc-extras
grub2-i386-efi-extras
grub2-powerpc-ieee1275
grub2-s390x-emu-extras
grub2-i386-efi
grub2-x86_64-xen-extras
grub2-efi-ia32-cdboot
grub2-efi-ia32
grub2-pc-modules
grub2-help
grub2-efi-x64-modules
grub2-efi-ia32-modules
grub2-efi-aa64-modules
grub2-common
grub2-tools-minimal
grub2-tools-extra
grub2-tools
grub2-efi-aa64-cdboot
grub2-efi-aa64
grub2-tools-efi
grub2-pc
grub2-efi-x64-cdboot
grub2-efi-x64
grub2-x86_64-xen-debug
grub2-i386-xen-debug
grub2-efi-riscv64-cdboot
grub2-efi-loongarch64
grub2-efi-riscv64-modules
grub2-efi-loongarch64-modules
grub2-doc
grub2-emu-modules
grub2-emu
grub2-efi-loongarch64-cdboot
grub2-efi-riscv64

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

grub2-x86_64-efi - addressed in versions 2.02-193.1, 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2, 2.12-150700.19.19.1
grub2-debugsource - addressed in versions 2.02-193.1, 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2, 2.12-150700.19.19.1
grub2 - addressed in versions 2.02-193.1, 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2, 2.12-150700.19.19.1
grub2-i386-pc - addressed in versions 2.02-193.1, 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2, 2.12-150700.19.19.1
grub2-debuginfo - addressed in versions 2.02-193.1, 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2, 2.12-150700.19.19.1
grub2-x86_64-xen - addressed in versions 2.02-193.1, 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2, 2.12-150700.19.19.1
grub2-systemd-sleep-plugin - addressed in versions 2.02-193.1, 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2, 2.12-150700.19.19.1
grub2-snapper-plugin - addressed in versions 2.02-193.1, 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2, 2.12-150700.19.19.1
grub2-branding-upstream - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-arm64-efi-debug - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-x86_64-efi-extras - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-arm64-efi - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2, 2.12-150700.19.19.1
grub2-i386-xen-extras - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-arm64-efi-extras - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-i386-pc-debug - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-s390x-emu-debug - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-s390x-emu - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2, 2.12-150700.19.19.1
grub2-powerpc-ieee1275-extras - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-x86_64-efi-debug - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-powerpc-ieee1275-debug - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-i386-xen - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-i386-efi-debug - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-i386-pc-extras - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-i386-efi-extras - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-powerpc-ieee1275 - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2, 2.12-150700.19.19.1
grub2-s390x-emu-extras - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-i386-efi - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-x86_64-xen-extras - addressed in versions 2.04-150300.22.61.1, 2.06-150400.11.66.1, 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-efi-ia32-cdboot - addressed in versions 2.06-53, 2.12-47
grub2-efi-ia32 - addressed in versions 2.06-53, 2.12-47
grub2-pc-modules - addressed in versions 2.06-53, 2.12-47
grub2-help - addressed in versions 2.06-53, 2.12-47
grub2-efi-x64-modules - addressed in versions 2.06-53, 2.12-47
grub2-efi-ia32-modules - addressed in versions 2.06-53, 2.12-47
grub2-efi-aa64-modules - addressed in versions 2.06-53, 2.12-47
grub2-common - addressed in versions 2.06-53, 2.12-47
grub2-tools-minimal - addressed in versions 2.06-53, 2.12-47
grub2-tools-extra - addressed in versions 2.06-53, 2.12-47
grub2-tools - addressed in versions 2.06-53, 2.12-47
grub2-efi-aa64-cdboot - addressed in versions 2.06-53, 2.12-47
grub2-efi-aa64 - addressed in versions 2.06-53, 2.12-47
grub2-debugsource - addressed in versions 2.06-53, 2.12-47
grub2-debuginfo - addressed in versions 2.06-53, 2.12-47
grub2 - addressed in versions 2.06-53, 2.12-47
grub2-tools-efi - addressed in versions 2.06-53, 2.12-47
grub2-pc - addressed in versions 2.06-53, 2.12-47
grub2-efi-x64-cdboot - addressed in versions 2.06-53, 2.12-47
grub2-efi-x64 - addressed in versions 2.06-53, 2.12-47
grub2-x86_64-xen-debug - addressed in versions 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-i386-xen-debug - addressed in versions 2.06-150500.29.59.1, 2.12-150600.8.44.2
grub2-efi-riscv64-cdboot - update to 2.12-17
grub2-tools-extra - update to 2.12-17
grub2-efi-loongarch64 - update to 2.12-17
grub2-pc-modules - update to 2.12-17
grub2-efi-x64-modules - update to 2.12-17
grub2-efi-riscv64-modules - update to 2.12-17
grub2-efi-loongarch64-modules - update to 2.12-17
grub2-efi-ia32-modules - update to 2.12-17
grub2-efi-aa64-modules - update to 2.12-17
grub2-doc - update to 2.12-17
grub2-common - update to 2.12-17
grub2-efi-aa64-cdboot - update to 2.12-17
grub2-efi-aa64 - update to 2.12-17
grub2-tools-minimal - update to 2.12-17
grub2-tools-efi - update to 2.12-17
grub2-tools - update to 2.12-17
grub2-pc - update to 2.12-17
grub2-emu-modules - update to 2.12-17
grub2-emu - update to 2.12-17
grub2-efi-x64-cdboot - update to 2.12-17
grub2-efi-x64 - update to 2.12-17
grub2-efi-ia32-cdboot - update to 2.12-17
grub2-efi-ia32 - update to 2.12-17
grub2-efi-loongarch64-cdboot - update to 2.12-17
grub2-efi-riscv64 - update to 2.12-17

• https://bugzilla.redhat.com/show_bug.cgi?id=2413827
• http://www.openwall.com/lists/oss-security/2025/11/18/8

• Multiple vulnerabilities in GNU GRUB
• SUSE update for grub2
• SUSE update for grub2
• SUSE update for grub2
• SUSE update for grub2
• SUSE update for grub2
• openEuler 22.03 LTS SP4 update for grub2
• openEuler 22.03 LTS SP3 update for grub2
• openEuler 24.03 LTS SP2 update for grub2
• openEuler 24.03 LTS SP1 update for grub2
• openEuler 24.03 LTS update for grub2
• SUSE update for grub2
• Anolis OS update for grub2