{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/blk-mq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c0ef7493e68b8896806a2f598fcffbaa97333405",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "e1dd7bc93029024af5688253b0c05181d6e01f8e",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "block/blk-mq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.5.*",
              "status": "unaffected",
              "version": "6.5.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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\u0027t need to realloc set-\u003etags[] 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 \u003e /mnt/nullb/nullb0/power\n5. echo 4 \u003e /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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-30T12:11:20.207Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c0ef7493e68b8896806a2f598fcffbaa97333405"
        },
        {
          "url": "https://git.kernel.org/stable/c/e1dd7bc93029024af5688253b0c05181d6e01f8e"
        }
      ],
      "title": "blk-mq: fix tags leak when shrink nr_hw_queues",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54227",
    "datePublished": "2025-12-30T12:11:20.207Z",
    "dateReserved": "2025-12-30T12:06:44.502Z",
    "dateUpdated": "2025-12-30T12:11:20.207Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-54227\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-30T13:16:11.093\",\"lastModified\":\"2025-12-31T20:42:43.210\",\"vulnStatus\":\"Awaiting Analysis\",\"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\u0027t need to realloc set-\u003etags[] 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 \u003e /mnt/nullb/nullb0/power\\n5. echo 4 \u003e /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.\"}],\"metrics\":{},\"references\":[{\"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\"}]}}"
  }
}