kernel: Drivers: hv: vmbus: Don't dereference ACPI root object handle

A NULL pointer dereference flaw was found in the Linux kernel's Hyper-V VMBus driver in the ACPI resource walking logic. A local user can trigger this issue on systems running under hypervisors that do not provide Hyper-V MMIO ranges in the VMBus ACPI device hierarchy, causing the driver to walk ...

CLSA-2024-1714073393 Fix of 16 CVEs

Jammy update: v5.15.81 upstream stable release LP: 2003130 // CVE-url: https://ubuntu.com/security/CVE-2023-1382 - tipc: set con sock in tipcconnalloc - tipc: add an extra connget in tipcconnalloc CVE-url: https://ubuntu.com/security/CVE-2023-1998 - x86/speculation: Allow enabling STIBP with lega...

kernel: ACPI: CPPC: Avoid out of bounds access when parsing _CPC data

In the Linux kernel, the following vulnerability has been resolved: ACPI: CPPC: Avoid out of bounds access when parsing CPC data If the NumEntries field in the CPC return package is less than 2, do not attempt to access the "Revision" element of that package, because it may not be present then...

PT-2025-8240

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A vulnerability in the Linux kernel has been resolved. The issue was related to the assignment of ACPI companions to xHCI ports and USB devices in the dwc3 host. The problem occurred...

A flaw was found in grub2 in versions prior to 2.06 where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table (SSDT) containing code to overwrite the Linux kernel lockdown variable content directly into memory. The table is further loaded and executed by the kernel defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

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grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled

A flaw was found in GRUB 2, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table SSDT containing code to overwrite the Linux kernel lockdown variable content direct...

kernel: lockdown: bypass through ACPI write via acpi_configfs

A flaw was found in how the ACPI table loading through acpiconfigfs was handled when the kernel was locked down. This flaw allows a root privileged local user to circumvent the kernel lockdown restrictions. The highest threat from this vulnerability is to data confidentiality and integrity as wel...