Gnu Grub2 vulnerabilities

CVE-2025-61662 [HIGH] CWE-416 CVE-2025-61662: A Use-After-Free vulnerability has been discovered in GRUB's gettext module. This flaw stems from a 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exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid. A

CVE-2025-54771 [MEDIUM] CWE-825 CVE-2025-54771: A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader). The f A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader). The flaw occurs because the file-closing process incorrectly retains a memory pointer, leaving an invalid reference to a file system structure. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible da

CVE-2025-54770 [MEDIUM] CWE-825 CVE-2025-54770: A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the net_set_vlan command is not properly unregistered when the network module is unloaded from memory. An attacker who can execute this command can force the system to

CVE-2025-61664 [MEDIUM] CWE-825 CVE-2025-61664: A vulnerability in the GRUB2 bootloader has been identified in the normal module. This flaw, a memor A vulnerability in the GRUB2 bootloader has been identified in the normal module. This flaw, a memory Use After Free issue, occurs because the normal_exit command is not properly unregistered when its related module is unloaded. An attacker can exploit this condition by invoking the command after the module has been removed, causing the system to im

CVE-2025-61661 [MEDIUM] CWE-131 CVE-2025-61661: A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occu 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

CVE-2025-61663 [MEDIUM] CWE-825 CVE-2025-61663: A vulnerability has been identified in the GRUB2 bootloader's normal command that poses an immediate 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 th

CVE-2024-45782 [HIGH] CWE-787 CVE-2024-45782: A flaw was found in the HFS filesystem. When reading an HFS volume's name at grub_fs_mount(), the HF A flaw was found in the HFS filesystem. When reading an HFS volume's name at grub_fs_mount(), the HFS filesystem driver performs a strcpy() using the user-provided volume name as input without properly validating the volume name's length. This issue may read to a heap-based out-of-bounds writer, impacting grub's sensitive data integrity and eventually

CVE-2025-1125 [HIGH] CWE-787 CVE-2025-1125: When reading data from a hfs filesystem, grub's hfs filesystem module uses user-controlled parameter When reading data from a hfs filesystem, grub's hfs filesystem module uses user-controlled parameters from the filesystem metadata to calculate the internal buffers size, however it misses to properly check for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size calculation to overflow, causing it to perform a grub_mall

CVE-2025-0678 [HIGH] CWE-190 CVE-2025-0678: A flaw was found in grub2. When reading data from a squash4 filesystem, grub's squash4 fs module use A flaw was found in grub2. When reading data from a squash4 filesystem, grub's squash4 fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciously crafted filesystem may lead some of those buffer size calculations to overflow, causing it

CVE-2025-0689 [HIGH] CWE-120 CVE-2025-0689: When reading data from disk, the grub's UDF filesystem module utilizes the user controlled data leng When reading data from disk, the grub's UDF filesystem module utilizes the user controlled data length metadata to allocate its internal buffers. In certain scenarios, while iterating through disk sectors, it assumes the read size from the disk is always smaller than the allocated buffer size which is not guaranteed. A crafted filesystem image may lead

CVE-2024-45779 [MEDIUM] CWE-190 CVE-2024-45779: An integer overflow flaw was found in the BFS file system driver in grub2. When reading a file with An integer overflow flaw was found in the BFS file system driver in grub2. When reading a file with an indirect extent map, grub2 fails to validate the number of extent entries to be read. A crafted or corrupted BFS filesystem may cause an integer overflow during the file reading, leading to a heap of bounds read. As a consequence, sensitive data may

CVE-2024-45778 [MEDIUM] CWE-190 CVE-2024-45778: A stack overflow flaw was found when reading a BFS file system. A crafted BFS filesystem may lead to A stack overflow flaw was found when reading a BFS file system. A crafted BFS filesystem may lead to an uncontrolled loop, causing grub2 to crash.

CVE-2024-45780 [MEDIUM] CWE-787 CVE-2024-45780: A flaw was found in grub2. When reading tar files, grub2 allocates an internal buffer for the file n A flaw was found in grub2. When reading tar files, grub2 allocates an internal buffer for the file name. However, it fails to properly verify the allocation against possible integer overflows. It's possible to cause the allocation length to overflow with a crafted tar file, leading to a heap out-of-bounds write. This flaw eventually allows an attack

CVE-2025-0684 [MEDIUM] CWE-787 CVE-2025-0684: A flaw was found in grub2. When performing a symlink lookup from a reiserfs filesystem, grub's reise A flaw was found in grub2. When performing a symlink lookup from a reiserfs filesystem, grub's reiserfs fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size calculations to ove

CVE-2025-0686 [MEDIUM] CWE-787 CVE-2025-0686: A flaw was found in grub2. When performing a symlink lookup from a romfs filesystem, grub's romfs fi A flaw was found in grub2. When performing a symlink lookup from a romfs filesystem, grub's romfs filesystem module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciously crafted filesystem may lead some of those buffer size calculations to

CVE-2025-0685 [MEDIUM] CWE-787 CVE-2025-0685: A flaw was found in grub2. When reading data from a jfs filesystem, grub's jfs filesystem module use A flaw was found in grub2. When reading data from a jfs filesystem, grub's jfs filesystem module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size calculations to overflow, causing it

CVE-2024-45777 [MEDIUM] CWE-787 CVE-2024-45777: A flaw was found in grub2. The calculation of the translation buffer when reading a language .mo fil A flaw was found in grub2. The calculation of the translation buffer when reading a language .mo file in grub_gettext_getstr_from_position() may overflow, leading to a Out-of-bound write. This issue can be leveraged by an attacker to overwrite grub2's sensitive heap data, eventually leading to the circumvention of secure boot protections.

CVE-2024-56737 [HIGH] CWE-122 CVE-2024-56737: GNU GRUB (aka GRUB2) through 2.12 has a heap-based buffer overflow in fs/hfs.c via crafted sblock da GNU GRUB (aka GRUB2) through 2.12 has a heap-based buffer overflow in fs/hfs.c via crafted sblock data in an HFS filesystem.

CVE-2024-56738 [MEDIUM] CWE-208 CVE-2024-56738: GNU GRUB (aka GRUB2) through 2.12 does not use a constant-time algorithm for grub_crypto_memcmp and GNU GRUB (aka GRUB2) through 2.12 does not use a constant-time algorithm for grub_crypto_memcmp and thus allows side-channel attacks.

CVE-2024-2312 [MEDIUM] CWE-416 CVE-2024-2312: GRUB2 does not call the module fini functions on exit, leading to Debian/Ubuntu's peimage GRUB2 modu GRUB2 does not call the module fini functions on exit, leading to Debian/Ubuntu's peimage GRUB2 module leaving UEFI system table hooks after exit. This lead to a use-after-free condition, and could possibly lead to secure boot bypass.