mm/page_alloc: prevent pcp corruption with SMP=n

{
  "id": "a62abf30d79896a19dfb2e03f2c3f350f6f04a50fbc39e7bc3d65eedb37d9fdf",
  "url": "https://osv.dev/vulnerability/CVE-2026-23025",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mm/page_alloc: prevent pcp corruption with SMP=n",
    "summary": "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: __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.c:227 mm/mmu_gather.c:290) ? __cfi_tlb_remove_table_rcu (mm/mmu_gather.c:289) ? rcu_core (kernel/rcu/tree.c:?) rcu_core (include/linux/rcupdate.h:341 kernel/rcu/tree.c:2607 kernel/rcu/tree.c:2861) rcu_core_si (kernel/rcu/tree.c:2879) handle_softirqs (arch/x86/include/asm/jump_label.h:36 include/trace/events/irq.h:142 kernel/softirq.c:623) __irq_exit_rcu (arch/x86/include/asm/jump_label.h:36 kernel/softirq.c:725) irq_exit_rcu (kernel/softirq.c:741) sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1052) RIP: 0010:_raw_spin_un",
    "evidence": "osv:CVE-2026-23025",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.1.162",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.6.122",
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          {
            "value": "6.12.67",
            "evidence": "/affected/1/ranges"
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            "value": "6.18.7",
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        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
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      "aliases": [
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      "modified": "2026-10-28T02:30:37.863274161Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-253495.html",
        "https://git.kernel.org/stable/c/038a102535eb49e10e93eafac54352fcc5d78847",
        "https://git.kernel.org/stable/c/3098f8f7c7b0686c74827aec42a2c45e69801ff8",
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        "https://git.kernel.org/stable/c/df63d31e9ae02e2f6cd96147779e4ed7cd0e75f6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23025.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-23025",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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    "security_relevant": true,
    "severity_evidence": null
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  "source_id": "core-osv",
  "document_id": 505061,
  "published_at": "2026-01-31T11:42:04.426+00:00"
}