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] [<ffffffff809a5818>] cppc_allow_fast_switch+0x6a/0xd4 ... Kernel panic - not syncing: Attempted to kill init! [ rjw: New subject ]

Score

CVSS 3.1 5.5 Medium

Status

Analyzed - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2025-07-03

Last modified

2026-05-11

Weaknesses

CWE-476

Affected products

• Debian Linux (Debian)
• Linux Kernel (Linux)

References

• https://git.kernel.org/stable/c/15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12
• https://git.kernel.org/stable/c/1a677d0ceb4a5d62117b711a8b2e0aee80d33015
• https://git.kernel.org/stable/c/32a48db4cf28ea087214c261da8476db218d08bd
• https://git.kernel.org/stable/c/356d09c7f5bf525086002a34f8bae40b134d1611
• https://git.kernel.org/stable/c/c6dad167aade4bf0bef9130f2f149f4249fc4ad0
• https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html