CVE-2025-38113

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

ACPI: CPPC: Fix NULL pointer dereference when nosmp is used

With nosmp in cmdline, other CPUs are not brought up, leaving
their cpc_desc_ptr NULL. CPU0’s iteration via for_each_possible_cpu()
dereferences these NULL pointers, causing panic.

Panic backtrace:

[ 0.401123] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000b8
…
[ 0.403255] [] cppc_allow_fast_switch+0x6a/0xd4
…
Kernel panic – not syncing: Attempted to kill init!

[ rjw: New subject ]

More information : https://git.kernel.org/stable/c/15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12