CVE-2025-38445 (GCVE-0-2025-38445)
Vulnerability from cvelistv5
Published
2025-07-25 15:27
Modified
2025-07-28 04:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: md/raid1: Fix stack memory use after return in raid1_reshape In the raid1_reshape function, newpool is allocated on the stack and assigned to conf->r1bio_pool. This results in conf->r1bio_pool.wait.head pointing to a stack address. Accessing this address later can lead to a kernel panic. Example access path: raid1_reshape() { // newpool is on the stack mempool_t newpool, oldpool; // initialize newpool.wait.head to stack address mempool_init(&newpool, ...); conf->r1bio_pool = newpool; } raid1_read_request() or raid1_write_request() { alloc_r1bio() { mempool_alloc() { // if pool->alloc fails remove_element() { --pool->curr_nr; } } } } mempool_free() { if (pool->curr_nr < pool->min_nr) { // pool->wait.head is a stack address // wake_up() will try to access this invalid address // which leads to a kernel panic return; wake_up(&pool->wait); } } Fix: reinit conf->r1bio_pool.wait after assigning newpool.
References
Impacted products
Vendor Product Version
Linux Linux Version: afeee514ce7f4cab605beedd03be71ebaf0c5fc8
Version: afeee514ce7f4cab605beedd03be71ebaf0c5fc8
Version: afeee514ce7f4cab605beedd03be71ebaf0c5fc8
Version: afeee514ce7f4cab605beedd03be71ebaf0c5fc8
Version: afeee514ce7f4cab605beedd03be71ebaf0c5fc8
Version: afeee514ce7f4cab605beedd03be71ebaf0c5fc8
Version: afeee514ce7f4cab605beedd03be71ebaf0c5fc8
Version: afeee514ce7f4cab605beedd03be71ebaf0c5fc8
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid1.c"
          ],
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid1.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "4.18"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.4.296",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.240",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.189",
              "versionType": "semver"
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              "version": "6.1.146",
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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                  "versionEndExcluding": "6.16",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1: Fix stack memory use after return in raid1_reshape\n\nIn the raid1_reshape function, newpool is\nallocated on the stack and assigned to conf-\u003er1bio_pool.\nThis results in conf-\u003er1bio_pool.wait.head pointing\nto a stack address.\nAccessing this address later can lead to a kernel panic.\n\nExample access path:\n\nraid1_reshape()\n{\n\t// newpool is on the stack\n\tmempool_t newpool, oldpool;\n\t// initialize newpool.wait.head to stack address\n\tmempool_init(\u0026newpool, ...);\n\tconf-\u003er1bio_pool = newpool;\n}\n\nraid1_read_request() or raid1_write_request()\n{\n\talloc_r1bio()\n\t{\n\t\tmempool_alloc()\n\t\t{\n\t\t\t// if pool-\u003ealloc fails\n\t\t\tremove_element()\n\t\t\t{\n\t\t\t\t--pool-\u003ecurr_nr;\n\t\t\t}\n\t\t}\n\t}\n}\n\nmempool_free()\n{\n\tif (pool-\u003ecurr_nr \u003c pool-\u003emin_nr) {\n\t\t// pool-\u003ewait.head is a stack address\n\t\t// wake_up() will try to access this invalid address\n\t\t// which leads to a kernel panic\n\t\treturn;\n\t\twake_up(\u0026pool-\u003ewait);\n\t}\n}\n\nFix:\nreinit conf-\u003er1bio_pool.wait after assigning newpool."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:22:28.949Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d8a6853d00fbaa810765c8ed2f452a5832273968"
        },
        {
          "url": "https://git.kernel.org/stable/c/12b00ec99624f8da8c325f2dd6e807df26df0025"
        },
        {
          "url": "https://git.kernel.org/stable/c/48da050b4f54ed639b66278d0ae6f4107b2c4e2d"
        },
        {
          "url": "https://git.kernel.org/stable/c/5f35e48b76655e45522df338876dfef88dafcc71"
        },
        {
          "url": "https://git.kernel.org/stable/c/df5894014a92ff0196dbc212a7764e97366fd2b7"
        },
        {
          "url": "https://git.kernel.org/stable/c/776e6186dc9ecbdb8a1b706e989166c8a99bbf64"
        },
        {
          "url": "https://git.kernel.org/stable/c/61fd5e93006cf82ec8ee5c115ab5cf4bbd104bdb"
        },
        {
          "url": "https://git.kernel.org/stable/c/d67ed2ccd2d1dcfda9292c0ea8697a9d0f2f0d98"
        }
      ],
      "title": "md/raid1: Fix stack memory use after return in raid1_reshape",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38445",
    "datePublished": "2025-07-25T15:27:28.035Z",
    "dateReserved": "2025-04-16T04:51:24.017Z",
    "dateUpdated": "2025-07-28T04:22:28.949Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38445\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-25T16:15:29.980\",\"lastModified\":\"2025-07-29T14:14:55.157\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmd/raid1: Fix stack memory use after return in raid1_reshape\\n\\nIn the raid1_reshape function, newpool is\\nallocated on the stack and assigned to conf-\u003er1bio_pool.\\nThis results in conf-\u003er1bio_pool.wait.head pointing\\nto a stack address.\\nAccessing this address later can lead to a kernel panic.\\n\\nExample access path:\\n\\nraid1_reshape()\\n{\\n\\t// newpool is on the stack\\n\\tmempool_t newpool, oldpool;\\n\\t// initialize newpool.wait.head to stack address\\n\\tmempool_init(\u0026newpool, ...);\\n\\tconf-\u003er1bio_pool = newpool;\\n}\\n\\nraid1_read_request() or raid1_write_request()\\n{\\n\\talloc_r1bio()\\n\\t{\\n\\t\\tmempool_alloc()\\n\\t\\t{\\n\\t\\t\\t// if pool-\u003ealloc fails\\n\\t\\t\\tremove_element()\\n\\t\\t\\t{\\n\\t\\t\\t\\t--pool-\u003ecurr_nr;\\n\\t\\t\\t}\\n\\t\\t}\\n\\t}\\n}\\n\\nmempool_free()\\n{\\n\\tif (pool-\u003ecurr_nr \u003c pool-\u003emin_nr) {\\n\\t\\t// pool-\u003ewait.head is a stack address\\n\\t\\t// wake_up() will try to access this invalid address\\n\\t\\t// which leads to a kernel panic\\n\\t\\treturn;\\n\\t\\twake_up(\u0026pool-\u003ewait);\\n\\t}\\n}\\n\\nFix:\\nreinit conf-\u003er1bio_pool.wait after assigning newpool.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: md/raid1: Corregir el uso de memoria de la pila despu\u00e9s del retorno en raid1_reshape En la funci\u00f3n raid1_reshape, newpool se asigna en la pila y a conf-\u0026gt;r1bio_pool. Esto da como resultado que conf-\u0026gt;r1bio_pool.wait.head apunte a una direcci\u00f3n de pila. Acceder a esta direcci\u00f3n m\u00e1s tarde puede provocar un p\u00e1nico del kernel. Ejemplo de ruta de acceso: raid1_reshape() { // newpool est\u00e1 en la pila mempool_t newpool, oldpool; // inicializar newpool.wait.head en la direcci\u00f3n de la pila mempool_init(\u0026amp;newpool, ...); conf-\u0026gt;r1bio_pool = newpool; } raid1_read_request() o raid1_write_request() { alloc_r1bio() { mempool_alloc() { // si pool-\u0026gt;alloc falla remove_element() { --pool-\u0026gt;curr_nr; } } } } mempool_free() { if (pool-\u0026gt;curr_nr \u0026lt; pool-\u0026gt;min_nr) { // pool-\u0026gt;wait.head es una direcci\u00f3n de pila // wake_up() intentar\u00e1 acceder a esta direcci\u00f3n no v\u00e1lida // lo que genera un p\u00e1nico del kernel return; wake_up(\u0026amp;pool-\u0026gt;wait); } } Soluci\u00f3n: reinicie conf-\u0026gt;r1bio_pool.wait despu\u00e9s de asignar newpool.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/12b00ec99624f8da8c325f2dd6e807df26df0025\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/48da050b4f54ed639b66278d0ae6f4107b2c4e2d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5f35e48b76655e45522df338876dfef88dafcc71\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/61fd5e93006cf82ec8ee5c115ab5cf4bbd104bdb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/776e6186dc9ecbdb8a1b706e989166c8a99bbf64\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d67ed2ccd2d1dcfda9292c0ea8697a9d0f2f0d98\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d8a6853d00fbaa810765c8ed2f452a5832273968\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/df5894014a92ff0196dbc212a7764e97366fd2b7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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