CVE-2024-36478 (GCVE-0-2024-36478)

Vulnerability from cvelistv5 – Published: 2024-06-21 10:18 – Updated: 2026-05-11 20:16
VLAI
Title
null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues'
Summary
In the Linux kernel, the following vulnerability has been resolved: null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues' Writing 'power' and 'submit_queues' concurrently will trigger kernel panic: Test script: modprobe null_blk nr_devices=0 mkdir -p /sys/kernel/config/nullb/nullb0 while true; do echo 1 > submit_queues; echo 4 > submit_queues; done & while true; do echo 1 > power; echo 0 > power; done Test result: BUG: kernel NULL pointer dereference, address: 0000000000000148 Oops: 0000 [#1] PREEMPT SMP RIP: 0010:__lock_acquire+0x41d/0x28f0 Call Trace: <TASK> lock_acquire+0x121/0x450 down_write+0x5f/0x1d0 simple_recursive_removal+0x12f/0x5c0 blk_mq_debugfs_unregister_hctxs+0x7c/0x100 blk_mq_update_nr_hw_queues+0x4a3/0x720 nullb_update_nr_hw_queues+0x71/0xf0 [null_blk] nullb_device_submit_queues_store+0x79/0xf0 [null_blk] configfs_write_iter+0x119/0x1e0 vfs_write+0x326/0x730 ksys_write+0x74/0x150 This is because del_gendisk() can concurrent with blk_mq_update_nr_hw_queues(): nullb_device_power_store nullb_apply_submit_queues null_del_dev del_gendisk nullb_update_nr_hw_queues if (!dev->nullb) // still set while gendisk is deleted return 0 blk_mq_update_nr_hw_queues dev->nullb = NULL Fix this problem by resuing the global mutex to protect nullb_device_power_store() and nullb_update_nr_hw_queues() from configfs.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:09 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 45919fbfe1c487c17ea1d198534339a5e8abeae3 , < 1d4c8baef435c98e8d5aa7027dc5a9f70834ba16 (git)
Affected: 45919fbfe1c487c17ea1d198534339a5e8abeae3 , < aaadb755f2d684f715a6eb85cb7243aa0c67dfa9 (git)
Affected: 45919fbfe1c487c17ea1d198534339a5e8abeae3 , < 5d0495473ee4c1d041b5a917f10446a22c047f47 (git)
Affected: 45919fbfe1c487c17ea1d198534339a5e8abeae3 , < a2db328b0839312c169eb42746ec46fc1ab53ed2 (git)
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Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 6.1.119 , ≤ 6.1.* (semver)
Unaffected: 6.6.55 , ≤ 6.6.* (semver)
Unaffected: 6.9.4 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: fix null-ptr-dereference while configuring \u0027power\u0027 and \u0027submit_queues\u0027\n\nWriting \u0027power\u0027 and \u0027submit_queues\u0027 concurrently will trigger kernel\npanic:\n\nTest script:\n\nmodprobe null_blk nr_devices=0\nmkdir -p /sys/kernel/config/nullb/nullb0\nwhile true; do echo 1 \u003e submit_queues; echo 4 \u003e submit_queues; done \u0026\nwhile true; do echo 1 \u003e power; echo 0 \u003e power; done\n\nTest result:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000148\nOops: 0000 [#1] PREEMPT SMP\nRIP: 0010:__lock_acquire+0x41d/0x28f0\nCall Trace:\n \u003cTASK\u003e\n lock_acquire+0x121/0x450\n down_write+0x5f/0x1d0\n simple_recursive_removal+0x12f/0x5c0\n blk_mq_debugfs_unregister_hctxs+0x7c/0x100\n blk_mq_update_nr_hw_queues+0x4a3/0x720\n nullb_update_nr_hw_queues+0x71/0xf0 [null_blk]\n nullb_device_submit_queues_store+0x79/0xf0 [null_blk]\n configfs_write_iter+0x119/0x1e0\n vfs_write+0x326/0x730\n ksys_write+0x74/0x150\n\nThis is because del_gendisk() can concurrent with\nblk_mq_update_nr_hw_queues():\n\nnullb_device_power_store\tnullb_apply_submit_queues\n null_del_dev\n del_gendisk\n\t\t\t\t nullb_update_nr_hw_queues\n\t\t\t\t  if (!dev-\u003enullb)\n\t\t\t\t  // still set while gendisk is deleted\n\t\t\t\t   return 0\n\t\t\t\t  blk_mq_update_nr_hw_queues\n dev-\u003enullb = NULL\n\nFix this problem by resuing the global mutex to protect\nnullb_device_power_store() and nullb_update_nr_hw_queues() from configfs."
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: null_blk: corrige la dereferencia null-ptr al configurar \u0027power\u0027 y \u0027submit_queues\u0027. Escribir \u0027power\u0027 y \u0027submit_queues\u0027 simult\u00e1neamente provocar\u00e1 un p\u00e1nico en el kernel: Script de prueba: modprobe null_blk nr_devices= 0 mkdir -p /sys/kernel/config/nullb/nullb0 mientras sea verdadero; hacer eco 1 \u0026gt; enviar_queues; eco 4 \u0026gt; enviar_colas; hecho y mientras sea cierto; hacer eco 1 \u0026gt; potencia; eco 0 \u0026gt; potencia; hecho Resultado de la prueba: ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000148 Ups: 0000 [#1] RIP SMP PREEMPLEADO: 0010:__lock_acquire+0x41d/0x28f0 Seguimiento de llamada:  lock_acquire+0x121/0x450 down_write+0x5f/0x1d0 simple_recursive _eliminaci\u00f3n+ 0x12f/0x5c0 blk_mq_debugfs_unregister_hctxs+0x7c/0x100 blk_mq_update_nr_hw_queues+0x4a3/0x720 nullb_update_nr_hw_queues+0x71/0xf0 [null_blk] /0xf0 [null_blk] configfs_write_iter+0x119/0x1e0 vfs_write+0x326/0x730 ksys_write+0x74/0x150 Esto se debe a que del_gendisk() puede concurrente con blk_mq_update_nr_hw_queues(): nullb_device_power_store nullb_apply_submit_queues null_del_dev del_gendisk nullb_update_nr_hw_queues if (!dev-\u0026gt;nullb) // todav\u00eda est\u00e1 configurado mientras se elimina gendisk return 0 blk_mq_update_nr_hw_queues dev-\u0026gt;nullb = NULL Fix este problema reutilizando el mutex global para proteger nullb_device_power_store() y nullb_update_nr_hw_queues() de configfs."
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      "current_release_date": "2025-11-21T14:39:27+00:00",
      "cve": "CVE-2024-36478",
      "id": "CVE-2024-36478",
      "initial_release_date": "2024-06-21T00:00:00+00:00",
      "product_status:known_affected": "48",
      "product_status:known_not_affected": "150",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: null_blk: fix null-ptr-dereference while configuring \u0026#39;power\u0026#39; and \u0026#39;submit_queues\u0026#39;",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-36478.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2025-11-03T21:55:17.674Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://git.kernel.org/stable/c/5d0495473ee4c1d041b5a917f10446a22c047f47"
              },
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://git.kernel.org/stable/c/a2db328b0839312c169eb42746ec46fc1ab53ed2"
              },
              {
                "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2024-36478",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-09-10T17:09:31.490057Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-09-11T12:42:25.705Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/block/null_blk/main.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "1d4c8baef435c98e8d5aa7027dc5a9f70834ba16",
                  "status": "affected",
                  "version": "45919fbfe1c487c17ea1d198534339a5e8abeae3",
                  "versionType": "git"
                },
                {
                  "lessThan": "aaadb755f2d684f715a6eb85cb7243aa0c67dfa9",
                  "status": "affected",
                  "version": "45919fbfe1c487c17ea1d198534339a5e8abeae3",
                  "versionType": "git"
                },
                {
                  "lessThan": "5d0495473ee4c1d041b5a917f10446a22c047f47",
                  "status": "affected",
                  "version": "45919fbfe1c487c17ea1d198534339a5e8abeae3",
                  "versionType": "git"
                },
                {
                  "lessThan": "a2db328b0839312c169eb42746ec46fc1ab53ed2",
                  "status": "affected",
                  "version": "45919fbfe1c487c17ea1d198534339a5e8abeae3",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/block/null_blk/main.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.5"
                },
                {
                  "lessThan": "5.5",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.119",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.55",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.9.*",
                  "status": "unaffected",
                  "version": "6.9.4",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.10",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.119",
                      "versionStartIncluding": "5.5",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.55",
                      "versionStartIncluding": "5.5",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.9.4",
                      "versionStartIncluding": "5.5",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.10",
                      "versionStartIncluding": "5.5",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: fix null-ptr-dereference while configuring \u0027power\u0027 and \u0027submit_queues\u0027\n\nWriting \u0027power\u0027 and \u0027submit_queues\u0027 concurrently will trigger kernel\npanic:\n\nTest script:\n\nmodprobe null_blk nr_devices=0\nmkdir -p /sys/kernel/config/nullb/nullb0\nwhile true; do echo 1 \u003e submit_queues; echo 4 \u003e submit_queues; done \u0026\nwhile true; do echo 1 \u003e power; echo 0 \u003e power; done\n\nTest result:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000148\nOops: 0000 [#1] PREEMPT SMP\nRIP: 0010:__lock_acquire+0x41d/0x28f0\nCall Trace:\n \u003cTASK\u003e\n lock_acquire+0x121/0x450\n down_write+0x5f/0x1d0\n simple_recursive_removal+0x12f/0x5c0\n blk_mq_debugfs_unregister_hctxs+0x7c/0x100\n blk_mq_update_nr_hw_queues+0x4a3/0x720\n nullb_update_nr_hw_queues+0x71/0xf0 [null_blk]\n nullb_device_submit_queues_store+0x79/0xf0 [null_blk]\n configfs_write_iter+0x119/0x1e0\n vfs_write+0x326/0x730\n ksys_write+0x74/0x150\n\nThis is because del_gendisk() can concurrent with\nblk_mq_update_nr_hw_queues():\n\nnullb_device_power_store\tnullb_apply_submit_queues\n null_del_dev\n del_gendisk\n\t\t\t\t nullb_update_nr_hw_queues\n\t\t\t\t  if (!dev-\u003enullb)\n\t\t\t\t  // still set while gendisk is deleted\n\t\t\t\t   return 0\n\t\t\t\t  blk_mq_update_nr_hw_queues\n dev-\u003enullb = NULL\n\nFix this problem by resuing the global mutex to protect\nnullb_device_power_store() and nullb_update_nr_hw_queues() from configfs."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T09:11:07.932Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/1d4c8baef435c98e8d5aa7027dc5a9f70834ba16"
            },
            {
              "url": "https://git.kernel.org/stable/c/aaadb755f2d684f715a6eb85cb7243aa0c67dfa9"
            },
            {
              "url": "https://git.kernel.org/stable/c/5d0495473ee4c1d041b5a917f10446a22c047f47"
            },
            {
              "url": "https://git.kernel.org/stable/c/a2db328b0839312c169eb42746ec46fc1ab53ed2"
            }
          ],
          "title": "null_blk: fix null-ptr-dereference while configuring \u0027power\u0027 and \u0027submit_queues\u0027",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-36478",
        "datePublished": "2024-06-21T10:18:09.027Z",
        "dateReserved": "2024-06-21T10:13:16.284Z",
        "dateUpdated": "2025-11-03T21:55:17.674Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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