CVE-2025-61662
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
A Use-After-Free vulnerability has been discovered in GRUB's gettext module. The flaw occurs because the gettext command remains registered in memory after its module is unloaded. An attacker can invoke the orphaned command, causing access to an invalid memory location.
Risk Assessment
The risk for the organization includes the possibility of intentionally crashing GRUB, leading to a Denial of Service (DoS). Potential compromise of data integrity or confidentiality cannot be ruled out.
Recommendation
It is recommended to immediately update GRUB to a version containing the fix for the Use-After-Free vulnerability in the gettext module. Consider restricting access to the GRUB console as well.
Other vulnerabilities in GRUB
See all- CVE-2022-2601High
A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph.
- CVE-2025-61661Medium
A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component due to improper string conversion when reading data from a USB device. A local attacker can connect a maliciously configured USB device during boot sequence, causing GRUB to crash and leading to a Denial of Service (DoS). Data corruption may also be possible, but due to exploit complexity the impact is likely limited.
- CVE-2025-4382Medium
In systems using LUKS-encrypted disks with GRUB configured for TPM-based auto-decryption, an attacker with physical access can corrupt the filesystem superblock. This forces GRUB into rescue mode while the decryption key remains in memory, allowing access to unencrypted data without authentication.
- CVE-2024-45782High
A flaw was found in the HFS filesystem driver in GRUB. When mounting an HFS volume, grub_fs_mount() performs a strcpy() on the user-provided volume name without validating its length, leading to a heap-based out-of-bounds write. This issue compromises GRUB's sensitive data integrity and may allow bypassing Secure Boot protection.
- CVE-2025-1125High
In the GRUB HFS+ module, an integer overflow vulnerability occurs when calculating buffer sizes based on user-controlled filesystem metadata. This can lead to allocating a smaller buffer than needed and subsequent out-of-bounds write in the hfsplus_open_compressed_real() function.
- CVE-2025-0689High
A heap-based buffer overflow vulnerability in the UDF filesystem module of GRUB allows an attacker to bypass Secure Boot protections. By crafting a malicious filesystem image, arbitrary code execution can be achieved during the boot process.
Original NVD description (English source)
A Use-After-Free vulnerability has been discovered in GRUB's gettext module. This flaw stems from a programming error where the gettext command remains registered in memory after its module is unloaded. An attacker can exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.