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CVE-2025-68756 block: Use RCU in blk_mq_[un]quiesce_tagset() instead of set->tag_list_lock

🗓️ 05 Jan 2026 09:32:29Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 24 Views

Block layer fix uses read copy update in quiesce_tagset to replace tag list lock, preventing deadlocks.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "block/blk-mq.c"
    ],
    "versions": [
      {
        "version": "98d81f0df70ce6fc48517d938026e3c684b9051a",
        "lessThan": "ca8764c0ea1fb825f17f19704af55e9e02c9f768",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "98d81f0df70ce6fc48517d938026e3c684b9051a",
        "lessThan": "3baeec23a82e7ee9691f434c6ab0ab1387326108",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "98d81f0df70ce6fc48517d938026e3c684b9051a",
        "lessThan": "6e8d363786765a81e35083e0909e076796468edf",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "98d81f0df70ce6fc48517d938026e3c684b9051a",
        "lessThan": "ef0cd7b694928573f6569e61c14f5f059253162e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "98d81f0df70ce6fc48517d938026e3c684b9051a",
        "lessThan": "59e25ef2b413c72da6686d431e7759302cfccafa",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "block/blk-mq.c"
    ],
    "versions": [
      {
        "version": "6.2",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.2",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.120",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.63",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.17.13",
        "lessThanOrEqual": "6.17.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.2",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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11 May 2026 21:52Current
EPSS0.00025
24