CVE-2025-38113 ACPI: CPPC: Fix NULL pointer dereference when nosmp is used
A local attacker can cause a kernel panic and denial of service by triggering a NULL pointer dereference in the ACPI CPPC driver when the nosmp boot parameter is used.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-38113?
CVE-2025-38113 is a medium-severity vulnerability in Debian Debian Linux, published on 3 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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] [<ffffffff809a5818>] cppc_allow_fast_switch+0x6a/0xd4 ... Kernel panic - not syncing: Attempted to kill init!
[ rjw: New subject ]
Weakness: CWE-476
Which versions are affected by CVE-2025-38113?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-38113?
Apply the vendor's patch.
Is CVE-2025-38113 being exploited?
There is no known exploitation of CVE-2025-38113 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-64619, BELL-CVE-2025-38113, DEBIAN-CVE-2025-38113, GHSA-656h-33vg-5h9x, ROOT-OS-DEBIAN-12-CVE-2025-38113, ROOT-OS-UBUNTU-2404-CVE-2025-38113 and 1 more.