{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-53123",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-53123"
  ],
  "published": "2026-06-24T16:31:02Z",
  "summary": "md: wake raid456 reshape waiters before suspend",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: wake raid456 reshape waiters before suspend\n\nDuring raid456 reshape, direct IO across the reshape position can sleep\nin raid5_make_request() waiting for reshape progress while still\nholding an active_io reference. If userspace then freezes reshape and\nwrites md/suspend_lo or md/suspend_hi, mddev_suspend() kills active_io\nand waits for all in-flight IO to drain.\n\nThis can deadlock: the IO needs reshape progress to continue, but the\nreshape thread is already frozen, so the active_io reference is never\ndropped and suspend never completes.\n\nraid5_prepare_suspend() already wakes wait_for_reshape for dm-raid. Do\nthe same for normal md suspend when reshape is already interrupted, so\nwaiting raid456 IO can abort, drop its reference, and let suspend\nfinish.\n\nThe mdadm test tests/25raid456-reshape-deadlock reproduces the hang.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-53123"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8b6a72420821e6da2cab6a69d5233500d2698b93"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ff6b93410192b812d73cc54062529715b2dc849f"
    },
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      "url": "https://git.kernel.org/stable/c/8ae3e14d7f3df58f7f49c02d74344e3dcd5f84f0"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cf86bb53b9c92354904a328e947a05ffbfdd1840"
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  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-06-24T16:31:02Z"
  }
}