CVE-2026-53123 (GCVE-0-2026-53123)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-06-24 16:30
VLAI
Title
md: wake raid456 reshape waiters before suspend
Summary
In the Linux kernel, the following vulnerability has been resolved: md: wake raid456 reshape waiters before suspend During raid456 reshape, direct IO across the reshape position can sleep in raid5_make_request() waiting for reshape progress while still holding an active_io reference. If userspace then freezes reshape and writes md/suspend_lo or md/suspend_hi, mddev_suspend() kills active_io and waits for all in-flight IO to drain. This can deadlock: the IO needs reshape progress to continue, but the reshape thread is already frozen, so the active_io reference is never dropped and suspend never completes. raid5_prepare_suspend() already wakes wait_for_reshape for dm-raid. Do the same for normal md suspend when reshape is already interrupted, so waiting raid456 IO can abort, drop its reference, and let suspend finish. The mdadm test tests/25raid456-reshape-deadlock reproduces the hang.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 714d20150ed85811193ae07a494d91f9927c590f , < 8b6a72420821e6da2cab6a69d5233500d2698b93 (git)
Affected: 714d20150ed85811193ae07a494d91f9927c590f , < ff6b93410192b812d73cc54062529715b2dc849f (git)
Affected: 714d20150ed85811193ae07a494d91f9927c590f , < 8ae3e14d7f3df58f7f49c02d74344e3dcd5f84f0 (git)
Affected: 714d20150ed85811193ae07a494d91f9927c590f , < cf86bb53b9c92354904a328e947a05ffbfdd1840 (git)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/md/md.c"
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      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:30:52.609Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      ],
      "title": "md: wake raid456 reshape waiters before suspend",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53123",
    "datePublished": "2026-06-24T16:30:52.609Z",
    "dateReserved": "2026-06-09T07:44:35.386Z",
    "dateUpdated": "2026-06-24T16:30:52.609Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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