{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-38008",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-38008"
  ],
  "published": "2025-06-18T09:29:20Z",
  "summary": "mm/page_alloc: fix race condition in unaccepted memory handling",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/page_alloc: fix race condition in unaccepted memory handling\n\nThe page allocator tracks the number of zones that have unaccepted memory\nusing static_branch_enc/dec() and uses that static branch in hot paths to\ndetermine if it needs to deal with unaccepted memory.\n\nBorislav and Thomas pointed out that the tracking is racy: operations on\nstatic_branch are not serialized against adding/removing unaccepted pages\nto/from the zone.\n\nSanity checks inside static_branch machinery detects it:\n\nWARNING: CPU: 0 PID: 10 at kernel/jump_label.c:276 __static_key_slow_dec_cpuslocked+0x8e/0xa0\n\nThe comment around the WARN() explains the problem:\n\n\t/*\n\t * Warn about the '-1' case though; since that means a\n\t * decrement is concurrent with a first (0->1) increment. IOW\n\t * people are trying to disable something that wasn't yet fully\n\t * enabled. This suggests an ordering problem on the user side.\n\t */\n\nThe effect of this static_branch optimization is only visible on\nmicrobenchmark.\n\nInstead of adding more complexity around it, remove it altogether.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-38008"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/98fdd2f612e949c652693f6df00442c81037776d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/74953f93f47a45296cc2a3fd04e2a3202ff3fa53"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/71dda1cb10702dc2859f00eb789b0502de2176a9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fefc075182275057ce607effaa3daa9e6e3bdc73"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}