CVE-2022-1665

A flaw was found in the Linux kernel, where a set of pre-production kernel packages of Red Hat Enterprise Linux for IBM Power architecture were signed with Red Hat's production secure boot keys. This issue allows kernel versions targeted for testing to eventually boot in PowerPC environments with...

[SECURITY] Fedora 35 Update: shim-unsigned-x64-15.6-1

Initial UEFI bootloader that handles chaining to a trusted full bootloader under secure boot environments...

[SECURITY] Fedora 35 Update: shim-unsigned-aarch64-15.6-1

Initial UEFI bootloader that handles chaining to a trusted full bootloader under secure boot environments...

[SECURITY] Fedora 35 Update: shim-15.6-1

Initial UEFI bootloader that handles chaining to a trusted full bootloader under secure boot environments. This package contains the version signed by the UEFI signing service...

SUSE SLES15 Security Update : kernel (SUSE-SU-2022:2104-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:2104-1 advisory. - In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and unmounting can lead to a...

USN-5484-1: Linux kernel vulnerabilities

It was discovered that the Linux kernel did not properly restrict access to the kernel debugger when booted in secure boot environments. A privileged attacker could use this to bypass UEFI Secure Boot restrictions. CVE-2022-21499 It was discovered that a race condition existed in the network...

USN-5484-1 linux vulnerabilities

It was discovered that the Linux kernel did not properly restrict access to the kernel debugger when booted in secure boot environments. A privileged attacker could use this to bypass UEFI Secure Boot restrictions. CVE-2022-21499 It was discovered that a race condition existed in the network...

Privilege Escalation

linux is vulnerable to privilege escalation. The vulnerability exists due to a lack of sanitization of access to the kernel debugger when booted in secure boot environments allowing an attacker to bypass UEFI Secure Boot restrictions...

grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap

A flaw was found in grub 2, where a crafted 16-bit grayscale PNG image may lead to an out-of-bounds write. This flaw allows an attacker to corrupt the data on the heap portion of the grub2's memory, leading to possible code execution and the circumvention of the secure boot mechanism...

grub2: shim_lock verifier allows non-kernel files to be loaded

A flaw was found in grub2. The shimlock verifier from grub2 allows non-kernel files to be loaded when secure boot is enabled, giving the possibility of unverified code or modules to be loaded when it should not be allowed...

grub2: Crafted JPEG image can lead to buffer underflow write in the heap

A flaw was found in grub2 when handling JPEG images. This flaw allows an attacker to craft a malicious JPEG image, which leads to an underflow on a grub2's internal pointer, leading to a heap-based out-of-bounds write. Secure-boot mechanisms circumvention and arbitrary code execution may also be...

grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap

A flaw was found in grub 2, where a crafted 16-bit grayscale PNG image may lead to an out-of-bounds write. This flaw allows an attacker to corrupt the data on the heap portion of the grub2's memory, leading to possible code execution and the circumvention of the secure boot mechanism...

grub2: shim_lock verifier allows non-kernel files to be loaded

A flaw was found in grub2. The shimlock verifier from grub2 allows non-kernel files to be loaded when secure boot is enabled, giving the possibility of unverified code or modules to be loaded when it should not be allowed...

grub2: Crafted JPEG image can lead to buffer underflow write in the heap

A flaw was found in grub2 when handling JPEG images. This flaw allows an attacker to craft a malicious JPEG image, which leads to an underflow on a grub2's internal pointer, leading to a heap-based out-of-bounds write. Secure-boot mechanisms circumvention and arbitrary code execution may also be...

Important: Red Hat Security Advisory: grub2, mokutil, shim, and shim-unsigned-x64 security update

An update for grub2, mokutil, shim, and shim-unsigned-x64 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap

A flaw was found in grub 2, where a crafted 16-bit grayscale PNG image may lead to an out-of-bounds write. This flaw allows an attacker to corrupt the data on the heap portion of the grub2's memory, leading to possible code execution and the circumvention of the secure boot mechanism...

grub2: shim_lock verifier allows non-kernel files to be loaded

A flaw was found in grub2. The shimlock verifier from grub2 allows non-kernel files to be loaded when secure boot is enabled, giving the possibility of unverified code or modules to be loaded when it should not be allowed...

grub2: Crafted JPEG image can lead to buffer underflow write in the heap

A flaw was found in grub2 when handling JPEG images. This flaw allows an attacker to craft a malicious JPEG image, which leads to an underflow on a grub2's internal pointer, leading to a heap-based out-of-bounds write. Secure-boot mechanisms circumvention and arbitrary code execution may also be...

Important: Red Hat Security Advisory: grub2, mokutil, shim, and shim-unsigned-x64 security update

An update for grub2, mokutil, shim, and shim-unsigned-x64 is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

grub2: shim_lock verifier allows non-kernel files to be loaded

A flaw was found in grub2. The shimlock verifier from grub2 allows non-kernel files to be loaded when secure boot is enabled, giving the possibility of unverified code or modules to be loaded when it should not be allowed...