Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v2m: Prevention of use after freeing gicv2mgetfwnode. With ACPI enabled, gicv2mgetfwnode is registered with the PCI subsystem as pcimsigetfwnodecb, and this function might be called during a PCI host bridge probe...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: mm: Move page table sync declarations to linux/pgtable.h During our internal testing, we began observing intermittent boot failures when the machine uses 4-level paging and has a large amount of persistent memory: BUG: Unable to...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: Drivers: vmbus: Check for channel allocation before looking up relid. relid2channel assumes that the vmbus channel array is already allocated when it is called. However, in situations like kdump/kexec, not all relids will be rese...

Astra Linux – Vulnerability in Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: “mmc: dwmmc: Fix IDMAC operation with pages larger than 4K” The commit 8396c793ffdf “mmc: dwmmc: Fix IDMAC operation with pages larger than 4K” increased the maxreqsize, even for 4K pages, causing various issues: - Panic during...

Astra Linux – Vulnerability in grub2

A flaw was discovered in grub2 in versions prior to 2.06. During USB device initialization, descriptors are read without sufficient bounds checking, assuming that the USB device provides valid values. If exploited properly, an attacker could cause memory corruption, leading to arbitrary code...

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 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 Linux

In the Linux kernel, the following vulnerability has been resolved: PID: Taking a reference when initializing cadpid During boot, kernelinitfreeable initializes cadpid to the struct pid of the init task. Later, we may change cadpid via sysctl. When this happens, procdocadpid will increment the...

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 Linux 5.10, Linux

In the Linux kernel, if the IMA appraisal method is used with the “imaappraiselog” boot parameter, lockdown can be circumvented using kexec on any machine when Secure Boot is disabled or unavailable. IMA prevents the “imaappraiselog” parameter from being set during boot, but this does not cover...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: EFI: Do not import certificates from UEFI Secure Boot for T2 Macs. On Apple T2 Macs, when Linux attempts to read the db and dbx EFI variables during early boot to load UEFI Secure Boot certificates, a page fault occurs in the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: Driver Core: Fixed the interaction between waitfordeviceprobe and deferredprobetimeout. The mounting of NFS rootfs timed out when deferredprobetimeout was non-zero 1. This occurred because the ipautoconfig initcall timed out...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: ARM: The refcount leak in axxiabootsecondary has been fixed. The offindcompatiblenode function returns a node pointer with a refcount incremented. We should use ofnodeput on it after processing. Add ofnodeput to avoid the...

Astra Linux – Vulnerability in grub2

A buffer overflow was detected in grubfontconstructglyph. A maliciously crafted pf2 font can cause an overflow when calculating the maxglyphsize value. This results in allocating a buffer that is smaller than necessary for the glyph, leading to another buffer overflow and an out-of-bounds write t...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: rtc: cmos: Fix event handler registration ordering issue Since acpiinstallfixedeventhandler automatically enables the event handling mechanism upon success, it is incorrect to call it before the handler routine is ready to handle...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: x86/i8259: The legacy PIC interrupts have been marked with IRQLEVEL. Baoquan reported that after triggering a crash, the subsequent boot process fails about half of the time. This occurs due to a NULL pointer dereference in the...

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 edk2

The BootPerformanceTable pointer is retrieved from an NVRAM variable within PEI. It is recommended that the PcdFirmwarePerformanceDataTableS3Support be set to FALSE...

Astra Linux – Vulnerability in edk2

In Ubuntu’s EDK2, a insecure default setting was left enabled, allowing UEFI Shell to be used. This enables an attacker with access to the operating system to bypass Secure Boot...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: Thermal: Intel: HFI – Added syscore callbacks for system-wide PM The kernel allocates a memory buffer and provides its location to the hardware, which uses it to update the HFI table. This allocation occurs during boot and remain...