CVE-2025-38209 (GCVE-0-2025-38209)
Vulnerability from cvelistv5
Published
2025-07-04 13:37
Modified
2025-07-28 04:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: remove tag set when second admin queue config fails Commit 104d0e2f6222 ("nvme-fabrics: reset admin connection for secure concatenation") modified nvme_tcp_setup_ctrl() to call nvme_tcp_configure_admin_queue() twice. The first call prepares for DH-CHAP negotitation, and the second call is required for secure concatenation. However, this change triggered BUG KASAN slab-use-after- free in blk_mq_queue_tag_busy_iter(). This BUG can be recreated by repeating the blktests test case nvme/063 a few times [1]. When the BUG happens, nvme_tcp_create_ctrl() fails in the call chain below: nvme_tcp_create_ctrl() nvme_tcp_alloc_ctrl() new=true ... Alloc nvme_tcp_ctrl and admin_tag_set nvme_tcp_setup_ctrl() new=true nvme_tcp_configure_admin_queue() new=true ... Succeed nvme_alloc_admin_tag_set() ... Alloc the tag set for admin_tag_set nvme_stop_keep_alive() nvme_tcp_teardown_admin_queue() remove=false nvme_tcp_configure_admin_queue() new=false nvme_tcp_alloc_admin_queue() ... Fail, but do not call nvme_remove_admin_tag_set() nvme_uninit_ctrl() nvme_put_ctrl() ... Free up the nvme_tcp_ctrl and admin_tag_set The first call of nvme_tcp_configure_admin_queue() succeeds with new=true argument. The second call fails with new=false argument. This second call does not call nvme_remove_admin_tag_set() on failure, due to the new=false argument. Then the admin tag set is not removed. However, nvme_tcp_create_ctrl() assumes that nvme_tcp_setup_ctrl() would call nvme_remove_admin_tag_set(). Then it frees up struct nvme_tcp_ctrl which has admin_tag_set field. Later on, the timeout handler accesses the admin_tag_set field and causes the BUG KASAN slab-use-after-free. To not leave the admin tag set, call nvme_remove_admin_tag_set() when the second nvme_tcp_configure_admin_queue() call fails. Do not return from nvme_tcp_setup_ctrl() on failure. Instead, jump to "destroy_admin" go-to label to call nvme_tcp_teardown_admin_queue() which calls nvme_remove_admin_tag_set().
References
Impacted products
Vendor Product Version
Linux Linux Version: 104d0e2f622233477ef7e57e59e8a4c3bb062c82
Version: 104d0e2f622233477ef7e57e59e8a4c3bb062c82
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "e7143706702a209c814ed2c3fc6486c2a7decf6c",
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              "version": "104d0e2f622233477ef7e57e59e8a4c3bb062c82",
              "versionType": "git"
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        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/tcp.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.4",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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          ]
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: remove tag set when second admin queue config fails\n\nCommit 104d0e2f6222 (\"nvme-fabrics: reset admin connection for secure\nconcatenation\") modified nvme_tcp_setup_ctrl() to call\nnvme_tcp_configure_admin_queue() twice. The first call prepares for\nDH-CHAP negotitation, and the second call is required for secure\nconcatenation. However, this change triggered BUG KASAN slab-use-after-\nfree in blk_mq_queue_tag_busy_iter(). This BUG can be recreated by\nrepeating the blktests test case nvme/063 a few times [1].\n\nWhen the BUG happens, nvme_tcp_create_ctrl() fails in the call chain\nbelow:\n\nnvme_tcp_create_ctrl()\n nvme_tcp_alloc_ctrl() new=true             ... Alloc nvme_tcp_ctrl and admin_tag_set\n nvme_tcp_setup_ctrl() new=true\n  nvme_tcp_configure_admin_queue() new=true ... Succeed\n   nvme_alloc_admin_tag_set()               ... Alloc the tag set for admin_tag_set\n  nvme_stop_keep_alive()\n  nvme_tcp_teardown_admin_queue() remove=false\n  nvme_tcp_configure_admin_queue() new=false\n   nvme_tcp_alloc_admin_queue()             ... Fail, but do not call nvme_remove_admin_tag_set()\n nvme_uninit_ctrl()\n nvme_put_ctrl()                            ... Free up the nvme_tcp_ctrl and admin_tag_set\n\nThe first call of nvme_tcp_configure_admin_queue() succeeds with\nnew=true argument. The second call fails with new=false argument. This\nsecond call does not call nvme_remove_admin_tag_set() on failure, due to\nthe new=false argument. Then the admin tag set is not removed. However,\nnvme_tcp_create_ctrl() assumes that nvme_tcp_setup_ctrl() would call\nnvme_remove_admin_tag_set(). Then it frees up struct nvme_tcp_ctrl which\nhas admin_tag_set field. Later on, the timeout handler accesses the\nadmin_tag_set field and causes the BUG KASAN slab-use-after-free.\n\nTo not leave the admin tag set, call nvme_remove_admin_tag_set() when\nthe second nvme_tcp_configure_admin_queue() call fails. Do not return\nfrom nvme_tcp_setup_ctrl() on failure. Instead, jump to \"destroy_admin\"\ngo-to label to call nvme_tcp_teardown_admin_queue() which calls\nnvme_remove_admin_tag_set()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:15:14.351Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/db1da838b6012e4570c6f81e28ffe1d0ff595948"
        },
        {
          "url": "https://git.kernel.org/stable/c/e7143706702a209c814ed2c3fc6486c2a7decf6c"
        }
      ],
      "title": "nvme-tcp: remove tag set when second admin queue config fails",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38209",
    "datePublished": "2025-07-04T13:37:28.853Z",
    "dateReserved": "2025-04-16T04:51:23.994Z",
    "dateUpdated": "2025-07-28T04:15:14.351Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38209\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-04T14:15:29.080\",\"lastModified\":\"2025-07-08T16:18:53.607\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnvme-tcp: remove tag set when second admin queue config fails\\n\\nCommit 104d0e2f6222 (\\\"nvme-fabrics: reset admin connection for secure\\nconcatenation\\\") modified nvme_tcp_setup_ctrl() to call\\nnvme_tcp_configure_admin_queue() twice. The first call prepares for\\nDH-CHAP negotitation, and the second call is required for secure\\nconcatenation. However, this change triggered BUG KASAN slab-use-after-\\nfree in blk_mq_queue_tag_busy_iter(). This BUG can be recreated by\\nrepeating the blktests test case nvme/063 a few times [1].\\n\\nWhen the BUG happens, nvme_tcp_create_ctrl() fails in the call chain\\nbelow:\\n\\nnvme_tcp_create_ctrl()\\n nvme_tcp_alloc_ctrl() new=true             ... Alloc nvme_tcp_ctrl and admin_tag_set\\n nvme_tcp_setup_ctrl() new=true\\n  nvme_tcp_configure_admin_queue() new=true ... Succeed\\n   nvme_alloc_admin_tag_set()               ... Alloc the tag set for admin_tag_set\\n  nvme_stop_keep_alive()\\n  nvme_tcp_teardown_admin_queue() remove=false\\n  nvme_tcp_configure_admin_queue() new=false\\n   nvme_tcp_alloc_admin_queue()             ... Fail, but do not call nvme_remove_admin_tag_set()\\n nvme_uninit_ctrl()\\n nvme_put_ctrl()                            ... Free up the nvme_tcp_ctrl and admin_tag_set\\n\\nThe first call of nvme_tcp_configure_admin_queue() succeeds with\\nnew=true argument. The second call fails with new=false argument. This\\nsecond call does not call nvme_remove_admin_tag_set() on failure, due to\\nthe new=false argument. Then the admin tag set is not removed. However,\\nnvme_tcp_create_ctrl() assumes that nvme_tcp_setup_ctrl() would call\\nnvme_remove_admin_tag_set(). Then it frees up struct nvme_tcp_ctrl which\\nhas admin_tag_set field. Later on, the timeout handler accesses the\\nadmin_tag_set field and causes the BUG KASAN slab-use-after-free.\\n\\nTo not leave the admin tag set, call nvme_remove_admin_tag_set() when\\nthe second nvme_tcp_configure_admin_queue() call fails. Do not return\\nfrom nvme_tcp_setup_ctrl() on failure. Instead, jump to \\\"destroy_admin\\\"\\ngo-to label to call nvme_tcp_teardown_admin_queue() which calls\\nnvme_remove_admin_tag_set().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nvme-tcp: eliminar el conjunto de etiquetas cuando falla la configuraci\u00f3n de la segunda cola de administraci\u00f3n. El commit 104d0e2f6222 (\\\"nvme-fabrics: restablecer la conexi\u00f3n de administraci\u00f3n para una concatenaci\u00f3n segura\\\") modific\u00f3 nvme_tcp_setup_ctrl() para llamar a nvme_tcp_configure_admin_queue() dos veces. La primera llamada prepara la negociaci\u00f3n DH-CHAP y la segunda es necesaria para la concatenaci\u00f3n segura. Sin embargo, este cambio activ\u00f3 el error \\\"slab-use-after-free\\\" en blk_mq_queue_tag_busy_iter()\\\". Este error se puede recrear repitiendo el caso de prueba blktests nvme/063 varias veces [1]. Cuando ocurre el ERROR, nvme_tcp_create_ctrl() falla en la siguiente cadena de llamadas: nvme_tcp_create_ctrl() nvme_tcp_alloc_ctrl() new=true ... Asignar nvme_tcp_ctrl y admin_tag_set nvme_tcp_setup_ctrl() new=true nvme_tcp_configure_admin_queue() new=true ... Correcto nvme_alloc_admin_tag_set() ... Asignar el conjunto de etiquetas para admin_tag_set nvme_stop_keep_alive() nvme_tcp_teardown_admin_queue() remove=false nvme_tcp_configure_admin_queue() new=false nvme_tcp_alloc_admin_queue() ... Falla, pero no se llama nvme_remove_admin_tag_set() nvme_uninit_ctrl() nvme_put_ctrl() ... Libera nvme_tcp_ctrl y admin_tag_set La primera llamada de nvme_tcp_configure_admin_queue() tiene \u00e9xito con el argumento new=true. La segunda llamada falla con el argumento new=false. Esta segunda llamada no llama a nvme_remove_admin_tag_set() en caso de error, debido al argumento new=false. Entonces, el conjunto de etiquetas admin no se elimina. Sin embargo, nvme_tcp_create_ctrl() supone que nvme_tcp_setup_ctrl() llamar\u00eda a nvme_remove_admin_tag_set(). Luego libera la estructura nvme_tcp_ctrl que tiene el campo admin_tag_set. Posteriormente, el controlador de tiempo de espera accede al campo admin_tag_set y provoca el error \\\"BUG KASAN slab-use-after-free\\\". Para mantener la etiqueta admin activa, llame a nvme_remove_admin_tag_set() cuando falle la segunda llamada a nvme_tcp_configure_admin_queue(). No regrese de nvme_tcp_setup_ctrl() en caso de error. En su lugar, vaya a la etiqueta \\\"destroy_admin\\\" para llamar a nvme_tcp_teardown_admin_queue(), que a su vez llama a nvme_remove_admin_tag_set().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/db1da838b6012e4570c6f81e28ffe1d0ff595948\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e7143706702a209c814ed2c3fc6486c2a7decf6c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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