{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "714d20150ed85811193ae07a494d91f9927c590f"
            },
            {
              "fixed": "8b6a72420821e6da2cab6a69d5233500d2698b93"
            },
            {
              "fixed": "ff6b93410192b812d73cc54062529715b2dc849f"
            },
            {
              "fixed": "8ae3e14d7f3df58f7f49c02d74344e3dcd5f84f0"
            },
            {
              "fixed": "cf86bb53b9c92354904a328e947a05ffbfdd1840"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.91"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53123.json"
  },
  "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.",
  "id": "CVE-2026-53123",
  "modified": "2026-07-08T05:39:11.246047075Z",
  "published": "2026-06-24T16:30:52.609Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ae3e14d7f3df58f7f49c02d74344e3dcd5f84f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b6a72420821e6da2cab6a69d5233500d2698b93"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf86bb53b9c92354904a328e947a05ffbfdd1840"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff6b93410192b812d73cc54062529715b2dc849f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53123.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53123"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "md: wake raid456 reshape waiters before suspend"
}