CVE-2026-23025

/// Technical description

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

mm/page_alloc: prevent pcp corruption with SMP=n

The kernel test robot has reported:

BUG: spinlock trylock failure on UP on CPU#0, kcompactd0/28

lock: 0xffff888807e35ef0, .magic: dead4ead, .owner: kcompactd0/28, .owner_cpu: 0

CPU: 0 UID: 0 PID: 28 Comm: kcompactd0 Not tainted 6.18.0-rc5-00127-ga06157804399 #1 PREEMPT 8cc09ef94dcec767faa911515ce9e609c45db470

Call Trace:

<IRQ>

__dump_stack (lib/dump_stack.c:95)

dump_stack_lvl (lib/dump_stack.c:123)

dump_stack (lib/dump_stack.c:130)

spin_dump (kernel/locking/spinlock_debug.c:71)

do_raw_spin_trylock (kernel/locking/spinlock_debug.c:?)

_raw_spin_trylock (include/linux/spinlock_api_smp.h:89 kernel/locking/spinlock.c:138)

__free_frozen_pages (mm/page_alloc.c:2973)

___free_pages (mm/page_alloc.c:5295)

__free_pages (mm/page_alloc.c:5334)

tlb_remove_table_rcu (include/linux/mm.h:? include/linux/mm.h:3122 include/asm-generic/tlb.h:220 mm/mmu_gather.

/// 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