CVE-2022-28736

CVE-2022-28736 describes a use-after-free in grub_cmd_chainloader() that is triggered when the chainloader command is executed more than once. The impact, as stated in the sources, includes exposure of sensitive data and potential arbitrary code execution with local access. Multiple advisories me...

CVE-2022-3775

CVE-2022-3775 affects grub2 font rendering (grub_font_construct_glyph). The issue arises when rendering certain unicode sequences: the code does not adequately validate the glyph width/height against the bitmap, causing an out-of-bounds write to grub2 heap, leading to memory corruption and potent...

CVE-2022-28735

The CVE-2022-28735 entry describes a vulnerability in GRUB2 where the shim_lock verifier allows loading non-kernel files on shim-powered secure boot systems, potentially breaking the secure boot trust-chain by loading unverified code or modules. Connected advisories (e.g., CBLMARINER entries for ...

CVE-2023-4692

Concretely documented: CVE-2023-4692 is an out-of-bounds write in grub2’s NTFS driver that can corrupt heap metadata, potentially enabling arbitrary code execution and secure-boot protection bypass. Several connected advisories (e.g., CBL-Mariner) note that a patched grub2 is available; affected ...

CVE-2020-25647

CVE-2020-25647 affects grub2 prior to 2.06. During USB device initialization, grub_usb_device_initialize() reads USB descriptors with very limited bounds checking, assuming sane device values. This can trigger memory corruption and lead to arbitrary code execution, bypassing Secure Boot. Reported...

CVE-2020-27779

The CVE-2020-27779 issue affects grub2 prior to 2.06. The cutmem command does not honor Secure Boot locking, enabling a local attacker with privilege to remove memory address ranges and potentially bypass Secure Boot protections. Impacted effect includes data confidentiality, integrity, and avail...

CVE-2020-14372

Summary: CVE-2020-14372 affects grub2 prior to version 2.06. The flaw enables the use of the ACPI command when Secure Boot is enabled, allowing a privileged attacker to craft an SSDT that overwrites the Linux kernel lockdown state in memory. The loaded SSDT is executed by the kernel, defeating Se...

CVE-2020-27749

CVE-2020-27749 affects grub2, with the vulnerability in grub_parser_split_cmdline() where variable names in the command line are expanded into contents using a 1 KB stack buffer without sufficient bounds checking. This can overflow the stack and corrupt the stack frame, potentially allowing code ...

CVE-2021-20225

CVE-2021-20225 affects grub2 up to version 2.06, with a heap out-of-bounds write in the short-form option parser. A local attacker could exploit this by supplying a large number of short option forms, potentially impacting data confidentiality, integrity, and availability. Public advisories and v...

CVE-2015-8370

GRUB2 vulnerability CVE-2015-8370 affects Grub2 1.98–2.02 and allows a local, physically proximate attacker to bypass authentication and potentially access sensitive data or cause denial of service via crafted backspace input in grub_username_get (grub-core/normal/auth.c) and grub_password_get (l...

CVE-2021-3697

CVE-2021-3697 is a grub2 JPEG handling vulnerability where crafting a JPEG image may cause a heap underflow in the JPEG reader, enabling data corruption and potentially code execution or secure-boot circumvention. It affects grub2 versions prior to the fixed release (notably legacy references to ...

CVE-2025-0678

The CVE-2025-0678 entry describes a grub2 squash4 filesystem flaw where integer overflow in buffer size calculations leads to grub_malloc() under-allocating and a heap-based out-of-bounds write during direct_read(), potentially allowing arbitrary code execution and bypass of secure boot. Connecte...

CVE-2025-0689

CVE-2025-0689 affects grub2, specifically the udf filesystem reader (grub_udf_read_block), where user-controlled data length metadata can cause a heap-based buffer overflow during disk read and sector iteration. This could corrupt data and allow arbitrary code execution, potentially bypassing sec...

CVE-2025-1125

CVE-2025-1125 concerns grub2, specifically the hfs filesystem module (fs/hfs) where integer overflow in buffer size calculations enables a heap-based out-of-bounds write. This can corrupt grub’s internal data and may allow arbitrary code execution with secure-boot bypass. Affected product: grub2 ...

CVE-2024-45782

CVE-2024-45782 affects grub2, specifically the HFS filesystem path where grub_fs_mount() uses strcpy on a user-provided volume name, enabling a heap-based out-of-bounds write and potential secure-boot bypass. Affected packages include grub2 prior to the updated 2.06 releases; remediation is to up...

CVE-2025-61662

CVE-2025-61662 involves a Use-After-Free in GRUB2’s gettext module where the gettext command remains registered after unloading, enabling an attacker to invoke an orphaned command and crash grub (DoS). The Initial Description notes potential data integrity/confidentiality risks but provides no pa...