CVE-2026-72215

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

MIPS: DEC: Ensure 32-bit stack location for o32 prom_printf()

In 64-bit configurations calling any firmware entry points from a kernel

thread other than the initial one will result in a situation where the

stack has been placed in the XKPHYS 64-bit memory segment.

Consequently the stack pointer is no longer a 32-bit value and when the

32-bit firmware code called uses 32-bit ALU operations to manipulate the

stack pointer, the calculated result is incorrect (in fact in the 64-bit

MIPS ISA almost all 32-bit ALU operations will produce an unpredictable

result when executed on 64-bit data) and control goes astray.

This may happen when no final console driver has been enabled in the

configuration and consequently the initial console continues being used

late into bootstrap, or with an upcoming change that will switch the zs

driver to use a platform device, which in turn will make the console

handover happen only after ot

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References