CVE-2023-53620 (GCVE-0-2023-53620)

Vulnerability from cvelistv5 – Published: 2025-10-07 15:19 – Updated: 2026-01-05 10:32
VLAI?
Title
md: fix soft lockup in status_resync
Summary
In the Linux kernel, the following vulnerability has been resolved: md: fix soft lockup in status_resync status_resync() will calculate 'curr_resync - recovery_active' to show user a progress bar like following: [============>........] resync = 61.4% 'curr_resync' and 'recovery_active' is updated in md_do_sync(), and status_resync() can read them concurrently, hence it's possible that 'curr_resync - recovery_active' can overflow to a huge number. In this case status_resync() will be stuck in the loop to print a large amount of '=', which will end up soft lockup. Fix the problem by setting 'resync' to MD_RESYNC_ACTIVE in this case, this way resync in progress will be reported to user.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b4acb6c3ede88d6b7d33742a09e63cfce5e7fb69 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 23309704e90859af2662bedc44101e6d1d2ece7e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6efddf1e32e2a264694766ca485a4f5e04ee82a7 (git)
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    Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.1.30 , ≤ 6.1.* (semver)
Unaffected: 6.3.4 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/md/md.c"
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              "negate": false,
              "operator": "OR"
            }
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: fix soft lockup in status_resync\n\nstatus_resync() will calculate \u0027curr_resync - recovery_active\u0027 to show\nuser a progress bar like following:\n\n[============\u003e........]  resync = 61.4%\n\n\u0027curr_resync\u0027 and \u0027recovery_active\u0027 is updated in md_do_sync(), and\nstatus_resync() can read them concurrently, hence it\u0027s possible that\n\u0027curr_resync - recovery_active\u0027 can overflow to a huge number. In this\ncase status_resync() will be stuck in the loop to print a large amount\nof \u0027=\u0027, which will end up soft lockup.\n\nFix the problem by setting \u0027resync\u0027 to MD_RESYNC_ACTIVE in this case,\nthis way resync in progress will be reported to user."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-05T10:32:22.287Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/b4acb6c3ede88d6b7d33742a09e63cfce5e7fb69"
        },
        {
          "url": "https://git.kernel.org/stable/c/23309704e90859af2662bedc44101e6d1d2ece7e"
        },
        {
          "url": "https://git.kernel.org/stable/c/6efddf1e32e2a264694766ca485a4f5e04ee82a7"
        }
      ],
      "title": "md: fix soft lockup in status_resync",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53620",
    "datePublished": "2025-10-07T15:19:26.686Z",
    "dateReserved": "2025-10-07T15:16:59.655Z",
    "dateUpdated": "2026-01-05T10:32:22.287Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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