Filtered by vendor Gnu
Subscriptions
Filtered by product Grub2
Subscriptions
Total
42 CVE
| CVE | Vendors | Products | Updated | CVSS v3.1 |
|---|---|---|---|---|
| CVE-2024-45782 | 2 Gnu, Redhat | 4 Grub2, Enterprise Linux, Openshift and 1 more | 2025-07-29 | 7.8 High |
| 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 leading to a secure boot protection bypass. | ||||
| CVE-2024-45779 | 2 Gnu, Redhat | 3 Grub2, Enterprise Linux, Openshift | 2025-07-29 | 6 Medium |
| 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 be leaked, or grub2 will crash. | ||||
| CVE-2024-45777 | 2 Gnu, Redhat | 3 Grub2, Enterprise Linux, Openshift | 2025-07-29 | 6.7 Medium |
| 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-2025-0685 | 2 Gnu, Redhat | 3 Grub2, Enterprise Linux, Openshift | 2025-07-28 | 6.4 Medium |
| 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 to perform a grub_malloc() operation with a smaller size than expected. As a result, the grub_jfs_lookup_symlink() function will write past the internal buffer length during grub_jfs_read_file(). This issue can be leveraged to corrupt grub's internal critical data and may result in arbitrary code execution, by-passing secure boot protections. | ||||
| CVE-2025-0686 | 2 Gnu, Redhat | 3 Grub2, Enterprise Linux, Openshift | 2025-07-28 | 6.4 Medium |
| 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 overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result, the grub_romfs_read_symlink() may cause out-of-bounds writes when the calling grub_disk_read() function. This issue may be leveraged to corrupt grub's internal critical data and can result in arbitrary code execution by-passing secure boot protections. | ||||
| CVE-2025-0684 | 2 Gnu, Redhat | 3 Grub2, Enterprise Linux, Openshift | 2025-07-28 | 6.4 Medium |
| 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 overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result, the grub_reiserfs_read_symlink() will call grub_reiserfs_read_real() with a overflown length parameter, leading to a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub's internal critical data and can result in arbitrary code execution, by-passing secure boot protections. | ||||
| CVE-2025-0678 | 2 Gnu, Redhat | 4 Grub2, Enterprise Linux, Openshift and 1 more | 2025-07-05 | 7.8 High |
| 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 to perform a grub_malloc() operation with a smaller size than expected. As a result, the direct_read() will perform a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub's internal critical data and may result in arbitrary code execution, by-passing secure boot protections. | ||||
| CVE-2024-56737 | 1 Gnu | 1 Grub2 | 2025-06-24 | 8.8 High |
| 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 | 1 Gnu | 1 Grub2 | 2025-06-24 | 5.3 Medium |
| 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-2019-14865 | 2 Gnu, Redhat | 5 Grub2, Enterprise Linux, Enterprise Linux Eus and 2 more | 2025-04-29 | 5.9 Medium |
| A flaw was found in the grub2-set-bootflag utility of grub2. A local attacker could run this utility under resource pressure (for example by setting RLIMIT), causing grub2 configuration files to be truncated and leaving the system unbootable on subsequent reboots. | ||||
| CVE-2015-8370 | 3 Fedoraproject, Gnu, Redhat | 3 Fedora, Grub2, Enterprise Linux | 2025-04-12 | 7.4 High |
| Multiple integer underflows in Grub2 1.98 through 2.02 allow physically proximate attackers to bypass authentication, obtain sensitive information, or cause a denial of service (disk corruption) via backspace characters in the (1) grub_username_get function in grub-core/normal/auth.c or the (2) grub_password_get function in lib/crypto.c, which trigger an "Off-by-two" or "Out of bounds overwrite" memory error. | ||||
| CVE-2022-28736 | 2 Gnu, Redhat | 4 Grub2, Enterprise Linux, Rhel E4s and 1 more | 2025-02-13 | 6.4 Medium |
| There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved. | ||||
| CVE-2022-28735 | 2 Gnu, Redhat | 4 Grub2, Enterprise Linux, Rhel E4s and 1 more | 2025-02-13 | 6.7 Medium |
| The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain. | ||||
| CVE-2022-28734 | 3 Gnu, Netapp, Redhat | 5 Grub2, Active Iq Unified Manager, Enterprise Linux and 2 more | 2025-02-13 | 8.1 High |
| Out-of-bounds write when handling split HTTP headers; When handling split HTTP headers, GRUB2 HTTP code accidentally moves its internal data buffer point by one position. This can lead to a out-of-bound write further when parsing the HTTP request, writing a NULL byte past the buffer. It's conceivable that an attacker controlled set of packets can lead to corruption of the GRUB2's internal memory metadata. | ||||
| CVE-2022-28733 | 2 Gnu, Redhat | 5 Grub2, Enterprise Linux, Rhel E4s and 2 more | 2025-02-13 | 8.1 High |
| Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in grub_net_recv_ip4_packets() function on rsm->total_len value. Under certain circumstances the total_len value may end up wrapping around to a small integer number which will be used in memory allocation. If the attack succeeds in such way, subsequent operations can write past the end of the buffer. | ||||
| CVE-2021-3981 | 3 Fedoraproject, Gnu, Redhat | 3 Fedora, Grub2, Enterprise Linux | 2025-02-13 | 3.3 Low |
| A flaw in grub2 was found where its configuration file, known as grub.cfg, is being created with the wrong permission set allowing non privileged users to read its content. This represents a low severity confidentiality issue, as those users can eventually read any encrypted passwords present in grub.cfg. This flaw affects grub2 2.06 and previous versions. This issue has been fixed in grub upstream but no version with the fix is currently released. | ||||
| CVE-2023-4001 | 3 Fedoraproject, Gnu, Redhat | 4 Fedora, Grub2, Enterprise Linux and 1 more | 2024-11-24 | 6.8 Medium |
| An authentication bypass flaw was found in GRUB due to the way that GRUB uses the UUID of a device to search for the configuration file that contains the password hash for the GRUB password protection feature. An attacker capable of attaching an external drive such as a USB stick containing a file system with a duplicate UUID (the same as in the "/boot/" file system) can bypass the GRUB password protection feature on UEFI systems, which enumerate removable drives before non-removable ones. This issue was introduced in a downstream patch in Red Hat's version of grub2 and does not affect the upstream package. | ||||
| CVE-2024-1048 | 3 Fedoraproject, Gnu, Redhat | 3 Fedora, Grub2, Enterprise Linux | 2024-11-23 | 3.3 Low |
| A flaw was found in the grub2-set-bootflag utility of grub2. After the fix of CVE-2019-14865, grub2-set-bootflag will create a temporary file with the new grubenv content and rename it to the original grubenv file. If the program is killed before the rename operation, the temporary file will not be removed and may fill the filesystem when invoked multiple times, resulting in a filesystem out of free inodes or blocks. | ||||
| CVE-2023-4693 | 2 Gnu, Redhat | 2 Grub2, Enterprise Linux | 2024-11-23 | 5.3 Medium |
| An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk. | ||||
| CVE-2023-4692 | 2 Gnu, Redhat | 2 Grub2, Enterprise Linux | 2024-11-23 | 7.5 High |
| An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved. | ||||