Vulnerability-Lookup

GHSA-26H7-GHCJ-373H

Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-24 18:32

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53123"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T17:17:26Z",
    "severity": null
  },
  "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": "GHSA-26h7-ghcj-373h",
  "modified": "2026-06-24T18:32:48Z",
  "published": "2026-06-24T18:32:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53123"
    },
    {
      "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-06-24 16:30

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

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/8b6a72420821e6da2…
https://git.kernel.org/stable/c/ff6b93410192b812d…
https://git.kernel.org/stable/c/8ae3e14d7f3df58f7…
https://git.kernel.org/stable/c/cf86bb53b9c923549…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 714d20150ed85811193ae07a494d91f9927c590f , < 8b6a72420821e6da2cab6a69d5233500d2698b93 (git) Affected: 714d20150ed85811193ae07a494d91f9927c590f , < ff6b93410192b812d73cc54062529715b2dc849f (git) Affected: 714d20150ed85811193ae07a494d91f9927c590f , < 8ae3e14d7f3df58f7f49c02d74344e3dcd5f84f0 (git) Affected: 714d20150ed85811193ae07a494d91f9927c590f , < cf86bb53b9c92354904a328e947a05ffbfdd1840 (git)
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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        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "drivers/md/md.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
            {
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          "versions": [
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              "version": "6.7"
            },
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              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
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              "version": "7.0.10",
              "versionType": "semver"
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              "versionType": "original_commit_for_fix"
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    "datePublished": "2026-06-24T16:30:52.609Z",
    "dateReserved": "2026-06-09T07:44:35.386Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-26H7-GHCJ-373H

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

Tags

Sightings

Nomenclature