Astra Linux – Vulnerability in grub2

A flaw was discovered in grub2 in versions prior to 2.06. Variable names present in the supplied command line are expanded into their corresponding variable contents, using a 1 kB stack buffer for temporary storage. However, there is insufficient bounds checking. If the function is called with a...

Astra Linux – Vulnerability in grub2

A out-of-bounds write flaw was discovered in grub2’s NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, resulting in corruption of grub’s heap metadata. In some cases, the attack may also corrupt the UEFI firmware heap metadata. As a...

Astra Linux – Vulnerability in grub2

The GRUB2’s shimlock 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 being loaded in GRUB2, thereby breaking the secure boot trust-chain...

Astra Linux – Vulnerability in grub2

A flaw was discovered in grub2. The calculation of the translation buffer when reading a language .mo file in grubgettextgetstrfromposition may overflow, resulting in an out-of-bound write. This issue can be exploited by an attacker to overwrite grub2’s sensitive heap data, ultimately allowing th...

Astra Linux – Vulnerability in grub2

When reading the .mo file in grubmofileopen, grub2 fails to verify an integer overflow during the allocation of its internal buffer. A specially crafted .mo file may cause the buffer size calculation to overflow, resulting in out-of-bound reads and writes. This flaw allows an attacker to leak...

Astra Linux – Vulnerability in grub2

A flaw was discovered in command/gpg. In some scenarios, hooks created by loaded modules are not removed when the related module is unloaded. This flaw allows an attacker to force grub2 to call the hooks once the module that registered them was unloaded, resulting in a use-after-free vulnerabilit...

Astra Linux – Vulnerability in grub2

A flaw was discovered in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking, allowing a privileged attacker to remove address ranges from memory. This creates an opportunity to circumvent SecureBoot protections after proper analysis of grub’s memory layout. The...

Astra Linux – Vulnerability in grub2

A flaw was discovered in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module that serves as a dependency without checking whether any other dependent modules are still loaded, resulting in a “use-after-free” scenario. This could allow arbitrary code to be...

Astra Linux – Vulnerability in grub2

A flaw was discovered in grub2. When performing a symlink lookup from a ReiserFS filesystem, grub’s ReiserFS module uses user-controlled parameters from the filesystem’s geometry to determine the internal buffer size. However, it improperly checks for integer overflows. A maliciously crafted...

CVE-2026-40003

ZTE ZX297520V3 BootROM contains a vulnerability that allows arbitrary memory writes via USB. Attackers can exploit the lack of target address validation in the USB download mode to write data to any location in BootROM runtime memory, thereby overwriting the stack, hijacking the execution flow,...

CVE-2026-41097

Reliance on a component that is not updateable in Windows Secure Boot allows an authorized attacker to bypass a security feature locally...

EUVD-2026-29685

Reliance on a component that is not updateable in Windows Secure Boot allows an authorized attacker to bypass a security feature locally...

CVE-2026-41097

Reliance on a component that is not updateable in Windows Secure Boot allows an authorized attacker to bypass a security feature locally...

CVE-2026-41097

CVE-2026-41097 describes a local security bypass in Windows Secure Boot caused by reliance on a non-updateable component. An authorized attacker could bypass a security feature locally. The CVE’s metrics show a medium base score (CVSS 3.1: 6.7; Local attack vector; high confidentiality/integrity/...

CVE-2026-41097 Secure Boot Security Feature Bypass Vulnerability

...

CVE-2026-41097

Reliance on a component that is not updateable in Windows Secure Boot allows an authorized attacker to bypass a security feature locally...

CVE-2026-41097 Secure Boot Security Feature Bypass Vulnerability

...

Secure Boot Security Feature Bypass Vulnerability

Reliance on a component that is not updateable in Windows Secure Boot allows an authorized attacker to bypass a security feature locally...

March 10, 2026—Hotpatch KB5078737 (OS Build 20348.4830)

None None...

May 12, 2026—KB5087420 (OS Build 22631.7079)

May 12, 2026—KB5087420 OS Build 22631.7079 ​​​​​This cumulative update for Windows 11, version 23H2 KB5087420, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security updates,...