CVE-2023-54227

{
  "id": "CVE-2023-54227",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-12-30T13:16:11.093",
  "lastModified": "2026-10-28T19:10:00.193",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: fix tags leak when shrink nr_hw_queues\n\nAlthough we don't need to realloc set->tags[] when shrink nr_hw_queues,\nwe need to free them. Or these tags will be leaked.\n\nHow to reproduce:\n1. mount -t configfs configfs /mnt\n2. modprobe null_blk nr_devices=0 submit_queues=8\n3. mkdir /mnt/nullb/nullb0\n4. echo 1 > /mnt/nullb/nullb0/power\n5. echo 4 > /mnt/nullb/nullb0/submit_queues\n6. rmdir /mnt/nullb/nullb0\n\nIn step 4, will alloc 9 tags (8 submit queues and 1 poll queue), then\nin step 5, new_nr_hw_queues = 5 (4 submit queues and 1 poll queue).\nAt last in step 6, only these 5 tags are freed, the other 4 tags leaked."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nblk-mq: corrige la fuga de etiquetas al reducir nr_hw_queues\n\nAunque no necesitamos reasignar set  ->  tags[] al reducir nr_hw_queues, necesitamos liberarlas. O estas etiquetas se fugarán.\n\nCómo reproducir:\n1. mount -t configfs configfs /mnt\n2. modprobe null_blk nr_devices=0 submit_queues=8\n3. mkdir /mnt/nullb/nullb0\n4. echo 1 > /mnt/nullb/nullb0/power\n5. echo 4 > /mnt/nullb/nullb0/submit_queues\n6. rmdir /mnt/nullb/nullb0\n\nEn el paso 4, se asignarán 9 etiquetas (8 colas de envío y 1 cola de sondeo), luego en el paso 5, new_nr_hw_queues = 5 (4 colas de envío y 1 cola de sondeo).\nFinalmente en el paso 6, solo estas 5 etiquetas son liberadas, las otras 4 etiquetas se fugaron."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "block/blk-mq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "a846a8e6c9a5949582c5a6a8bbc83a7d27fd891e",
              "lessThan": "26d495f0f64d8cd4fcd29206ee5c653ee0e0cbcd",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a846a8e6c9a5949582c5a6a8bbc83a7d27fd891e",
              "lessThan": "c0ef7493e68b8896806a2f598fcffbaa97333405",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a846a8e6c9a5949582c5a6a8bbc83a7d27fd891e",
              "lessThan": "e1dd7bc93029024af5688253b0c05181d6e01f8e",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "block/blk-mq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.16",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.16",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.189",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.5.5",
              "lessThanOrEqual": "6.5.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-15T21:39:33.828518Z",
          "id": "CVE-2023-54227",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/26d495f0f64d8cd4fcd29206ee5c653ee0e0cbcd",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c0ef7493e68b8896806a2f598fcffbaa97333405",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e1dd7bc93029024af5688253b0c05181d6e01f8e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}