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CVE-2023-54021 ext4: set goal start correctly in ext4_mb_normalize_request

🗓️ 24 Dec 2025 10:55:51Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 28 Views

Fix ext4_mb_normalize_request: use ac_g_ex for the goal start, enforce valid range, and guard size against underflow.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/ext4/mballoc.c"
    ],
    "versions": [
      {
        "version": "c9de560ded61faa5b754137b7753da252391c55a",
        "lessThan": "2479bb6cbdb4d56b807bbe5229e3e26a6f1f4530",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c9de560ded61faa5b754137b7753da252391c55a",
        "lessThan": "390eee955d4de4662db5e3e9e9a9eae020432cb7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c9de560ded61faa5b754137b7753da252391c55a",
        "lessThan": "cee78217a7ae72d11c2e21e1a5263b8044489823",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c9de560ded61faa5b754137b7753da252391c55a",
        "lessThan": "3ca3005b502ca8ea87d6a344323b179b48c4e4a3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c9de560ded61faa5b754137b7753da252391c55a",
        "lessThan": "bc4a3e1d07a86ae5845321d371190244acacb2f2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c9de560ded61faa5b754137b7753da252391c55a",
        "lessThan": "c6bee8970075b256fc1b07bf4873049219380818",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c9de560ded61faa5b754137b7753da252391c55a",
        "lessThan": "abb330ffaa3a0ae7ce632e28c9260b461c01f19f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c9de560ded61faa5b754137b7753da252391c55a",
        "lessThan": "b07ffe6927c75d99af534d685282ea188d9f71a6",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/ext4/mballoc.c"
    ],
    "versions": [
      {
        "version": "2.6.25",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.25",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "4.14.316",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "4.19.284",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.4.244",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.181",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.113",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.30",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.3.4",
        "lessThanOrEqual": "6.3.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.4",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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