CVE-2020-15707

CVE-2020-15707 is a GRUB2 bootloader vulnerability (initrd size handling) causing a heap-based buffer overflow via integer overflow in initrd processing. The flaw affects GRUB2 2.04 and earlier as deployed in multiple distros (Debian, Red Hat, Ubuntu) and can enable arbitrary code execution durin...

CVE-2020-15706

CVE-2020-15706 affects GRUB2 (2.04 and earlier) and is a race-condition/use-after-free in grub_script_function_create() triggered by redefining a function during execution, leading to arbitrary code execution and Secure Boot restriction bypass. Remediation is to upgrade to patched GRUB2 packages ...

CVE-2020-15705

GRUB2 ≤ 2.04 fails to validate kernel signatures when booting directly without shim, allowing Secure Boot bypass if the kernel signing certificate is in the Secure Boot DB. The issue affects GRUB2 2.04 and earlier; upgrades to patched grub2/shim combinations are advised (e.g., 2.06+ and related s...

CVE-2020-14311

CVE-2020-14311 affects grub2 up to version 2.06 where handling of symlinks on ext filesystems can trigger an arithmetic overflow when a filesystem contains a symbolic link with an inode size of UINT32_MAX. This overflow leads to a zero-sized memory allocation and a subsequent heap-based buffer ov...

CVE-2020-14310

CVE-2020-14310 affects grub2 prior to version 2.06. The issue is in read_section_as_string(): a font name of length UINT32_MAX may trigger arithmetic overflow, causing zero-size allocation and a subsequent heap-based buffer overflow. This requires a crafted malicious font file and is a local impa...

CVE-2020-14308

The CVE-2020-14308 issue affects grub2 prior to version 2.06, where the grub memory allocator does not validate arithmetic overflow in the requested allocation size. This can cause invalid memory allocations, with potential integrity, confidentiality, and availability impacts during the boot proc...

CVE-2020-14309

GRUB2 CVE-2020-14309 affects grub2

CVE-2021-3696

CVE-2021-3696 = heap out-of-bounds write during Huffman table handling in grub2’s PNG reader, causing potential heap corruption. Affected: grub2 before patch grub-2.12; implications listed as Low/Low/Low in some sources, with potential for data corruption and, in theory, arbitrary code execution ...

CVE-2021-3418

CVE-2021-3418 affects GRUB2 where, if certificates that sign GRUB are installed into the database, GRUB can boot any kernel without signature validation. The booted kernel may believe it is in Secure Boot lockdown, potentially allowing tampering. Affected: GRUB2 before 2.06 (including upstream an...

CVE-2023-4001

CVE-2023-4001 affects GRUB2 on certain downstream Red Hat patches where an attacker with physical access can bypass GRUB password protection by using a removable drive with a duplicate UUID to locate the config file containing the password hash. The issue was introduced in a downstream patch (not...

CVE-2024-45777

CVE-2024-45777 is a GRUB2 flaw where reading a language .mo file can overflow the translation buffer in grub_gettext_getstr_from_position(), causing an Out-of-Bounds write and potential circumvention of secure boot. Connected advisories confirm patched GRUB2 packages and versions: AlmaLinux 2025/...

CVE-2025-0684

CVE-2025-0684 – grub2 (reiserfs) heap-based OOB write Affects grub2’s reiserfs filesystem driver. The vulnerability arises during symlink lookups where the driver uses user-controlled filesystem geometry to size internal buffers and fails to properly guard for integer overflow. This can cause buf...

CVE-2024-45779

CVE-2024-45779 (grub2 BFS integer overflow): Affects the BFS filesystem driver in grub2. When reading a file with an indirect extent map, grub2 fails to validate the number of extent entries to be read, which can cause an integer overflow during file reading. This may trigger a heap-based bounds ...

CVE-2025-0686

Affects grub2 ROMFS symlink handling (CVE-2025-0686). The romfs module uses user-controlled geometry parameters to size buffers in symlink lookups and fails to guard integer overflows, allowing buffer size miscalculation. This can cause grub_malloc to allocate too small a buffer, leading to out-o...

CVE-2024-45780

Grub2 TAR handling flaw (CVE-2024-45780): when reading tar files, grub2 may overflow allocation size due to integer overflow, causing a heap OOB write and potentially bypassing secure boot. Affected: grub2; Root cause: unchecked allocation length; Impact: confidentiality/integrity/availability hi...

CVE-2025-0685

CVE-2025-0685 affects grub2, specifically the JFS filesystem module. The vulnerability arises from an integer overflow in buffer size calculations when reading data from JFS, allowing grub_jfs_read_file() to write beyond an internal buffer via grub_jfs_lookup_symlink(), which could corrupt grub’s...

CVE-2024-2312

The CVE-2024-2312 issue affects GRUB2 and stems from not calling module fini functions on exit, which leaves UEFI system table hooks after exit (notably in Debian/Ubuntu’s peimage GRUB2 module). This creates a use-after-free condition and could potentially enable secure boot bypass. Connected rec...