{
  "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": "2dc97e15a54b7bdf457848aa8c663c98a24e58a6",
              "status": "affected",
              "version": "2f8f1336a48bd5186de3476da0a3e2ec06d0533a",
              "versionType": "git"
            },
            {
              "lessThan": "943f45b9399ed8b2b5190cbc797995edaa97f58f",
              "status": "affected",
              "version": "2f8f1336a48bd5186de3476da0a3e2ec06d0533a",
              "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": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "lessThan": "5.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.8",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: Fix kmemleak in blk_mq_init_allocated_queue\n\nThere is a kmemleak caused by modprobe null_blk.ko\n\nunreferenced object 0xffff8881acb1f000 (size 1024):\n  comm \"modprobe\", pid 836, jiffies 4294971190 (age 27.068s)\n  hex dump (first 32 bytes):\n    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........\n    ff ff ff ff ff ff ff ff 00 53 99 9e ff ff ff ff  .........S......\n  backtrace:\n    [\u003c000000004a10c249\u003e] kmalloc_node_trace+0x22/0x60\n    [\u003c00000000648f7950\u003e] blk_mq_alloc_and_init_hctx+0x289/0x350\n    [\u003c00000000af06de0e\u003e] blk_mq_realloc_hw_ctxs+0x2fe/0x3d0\n    [\u003c00000000e00c1872\u003e] blk_mq_init_allocated_queue+0x48c/0x1440\n    [\u003c00000000d16b4e68\u003e] __blk_mq_alloc_disk+0xc8/0x1c0\n    [\u003c00000000d10c98c3\u003e] 0xffffffffc450d69d\n    [\u003c00000000b9299f48\u003e] 0xffffffffc4538392\n    [\u003c0000000061c39ed6\u003e] do_one_initcall+0xd0/0x4f0\n    [\u003c00000000b389383b\u003e] do_init_module+0x1a4/0x680\n    [\u003c0000000087cf3542\u003e] load_module+0x6249/0x7110\n    [\u003c00000000beba61b8\u003e] __do_sys_finit_module+0x140/0x200\n    [\u003c00000000fdcfff51\u003e] do_syscall_64+0x35/0x80\n    [\u003c000000003c0f1f71\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThat is because q-\u003ema_ops is set to NULL before blk_release_queue is\ncalled.\n\nblk_mq_init_queue_data\n  blk_mq_init_allocated_queue\n    blk_mq_realloc_hw_ctxs\n      for (i = 0; i \u003c set-\u003enr_hw_queues; i++) {\n        old_hctx = xa_load(\u0026q-\u003ehctx_table, i);\n        if (!blk_mq_alloc_and_init_hctx(.., i, ..))\t\t[1]\n          if (!old_hctx)\n\t    break;\n\n      xa_for_each_start(\u0026q-\u003ehctx_table, j, hctx, j)\n        blk_mq_exit_hctx(q, set, hctx, j); \t\t\t[2]\n\n    if (!q-\u003enr_hw_queues)\t\t\t\t\t[3]\n      goto err_hctxs;\n\n  err_exit:\n      q-\u003emq_ops = NULL;\t\t\t  \t\t\t[4]\n\n  blk_put_queue\n    blk_release_queue\n      if (queue_is_mq(q))\t\t\t\t\t[5]\n        blk_mq_release(q);\n\n[1]: blk_mq_alloc_and_init_hctx failed at i != 0.\n[2]: The hctxs allocated by [1] are moved to q-\u003eunused_hctx_list and\nwill be cleaned up in blk_mq_release.\n[3]: q-\u003enr_hw_queues is 0.\n[4]: Set q-\u003emq_ops to NULL.\n[5]: queue_is_mq returns false due to [4]. And blk_mq_release\nwill not be called. The hctxs in q-\u003eunused_hctx_list are leaked.\n\nTo fix it, call blk_release_queue in exception path."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:48:17.645Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2dc97e15a54b7bdf457848aa8c663c98a24e58a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/943f45b9399ed8b2b5190cbc797995edaa97f58f"
        }
      ],
      "title": "blk-mq: Fix kmemleak in blk_mq_init_allocated_queue",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49901",
    "datePublished": "2025-05-01T14:10:46.974Z",
    "dateReserved": "2025-05-01T14:05:17.245Z",
    "dateUpdated": "2025-05-04T08:48:17.645Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49901\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T15:16:15.167\",\"lastModified\":\"2025-05-02T13:52:51.693\",\"vulnStatus\":\"Undergoing Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblk-mq: Fix kmemleak in blk_mq_init_allocated_queue\\n\\nThere is a kmemleak caused by modprobe null_blk.ko\\n\\nunreferenced object 0xffff8881acb1f000 (size 1024):\\n  comm \\\"modprobe\\\", pid 836, jiffies 4294971190 (age 27.068s)\\n  hex dump (first 32 bytes):\\n    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........\\n    ff ff ff ff ff ff ff ff 00 53 99 9e ff ff ff ff  .........S......\\n  backtrace:\\n    [\u003c000000004a10c249\u003e] kmalloc_node_trace+0x22/0x60\\n    [\u003c00000000648f7950\u003e] blk_mq_alloc_and_init_hctx+0x289/0x350\\n    [\u003c00000000af06de0e\u003e] blk_mq_realloc_hw_ctxs+0x2fe/0x3d0\\n    [\u003c00000000e00c1872\u003e] blk_mq_init_allocated_queue+0x48c/0x1440\\n    [\u003c00000000d16b4e68\u003e] __blk_mq_alloc_disk+0xc8/0x1c0\\n    [\u003c00000000d10c98c3\u003e] 0xffffffffc450d69d\\n    [\u003c00000000b9299f48\u003e] 0xffffffffc4538392\\n    [\u003c0000000061c39ed6\u003e] do_one_initcall+0xd0/0x4f0\\n    [\u003c00000000b389383b\u003e] do_init_module+0x1a4/0x680\\n    [\u003c0000000087cf3542\u003e] load_module+0x6249/0x7110\\n    [\u003c00000000beba61b8\u003e] __do_sys_finit_module+0x140/0x200\\n    [\u003c00000000fdcfff51\u003e] do_syscall_64+0x35/0x80\\n    [\u003c000000003c0f1f71\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\\n\\nThat is because q-\u003ema_ops is set to NULL before blk_release_queue is\\ncalled.\\n\\nblk_mq_init_queue_data\\n  blk_mq_init_allocated_queue\\n    blk_mq_realloc_hw_ctxs\\n      for (i = 0; i \u003c set-\u003enr_hw_queues; i++) {\\n        old_hctx = xa_load(\u0026q-\u003ehctx_table, i);\\n        if (!blk_mq_alloc_and_init_hctx(.., i, ..))\\t\\t[1]\\n          if (!old_hctx)\\n\\t    break;\\n\\n      xa_for_each_start(\u0026q-\u003ehctx_table, j, hctx, j)\\n        blk_mq_exit_hctx(q, set, hctx, j); \\t\\t\\t[2]\\n\\n    if (!q-\u003enr_hw_queues)\\t\\t\\t\\t\\t[3]\\n      goto err_hctxs;\\n\\n  err_exit:\\n      q-\u003emq_ops = NULL;\\t\\t\\t  \\t\\t\\t[4]\\n\\n  blk_put_queue\\n    blk_release_queue\\n      if (queue_is_mq(q))\\t\\t\\t\\t\\t[5]\\n        blk_mq_release(q);\\n\\n[1]: blk_mq_alloc_and_init_hctx failed at i != 0.\\n[2]: The hctxs allocated by [1] are moved to q-\u003eunused_hctx_list and\\nwill be cleaned up in blk_mq_release.\\n[3]: q-\u003enr_hw_queues is 0.\\n[4]: Set q-\u003emq_ops to NULL.\\n[5]: queue_is_mq returns false due to [4]. And blk_mq_release\\nwill not be called. The hctxs in q-\u003eunused_hctx_list are leaked.\\n\\nTo fix it, call blk_release_queue in exception path.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: blk-mq: Se corrige kmemleak en blk_mq_init_allocated_queue Hay una kmemleak causada por modprobe null_blk.ko objeto no referenciado 0xffff8881acb1f000 (tama\u00f1o 1024): comm \\\"modprobe\\\", pid 836, jiffies 4294971190 (edad 27.068s) volcado hexadecimal (primeros 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff ff 00 53 99 9e ff ff ff ff .........S...... backtrace: [\u0026lt;000000004a10c249\u0026gt;] kmalloc_node_trace+0x22/0x60 [\u0026lt;00000000648f7950\u0026gt;] blk_mq_alloc_and_init_hctx+0x289/0x350 [\u0026lt;00000000af06de0e\u0026gt;] blk_mq_realloc_hw_ctxs+0x2fe/0x3d0 [\u0026lt;00000000e00c1872\u0026gt;] blk_mq_init_allocated_queue+0x48c/0x1440 [\u0026lt;00000000d16b4e68\u0026gt;] __blk_mq_alloc_disk+0xc8/0x1c0 [\u0026lt;00000000d10c98c3\u0026gt;] 0xffffffffc450d69d [\u0026lt;00000000b9299f48\u0026gt;] 0xffffffffc4538392 [\u0026lt;0000000061c39ed6\u0026gt;] hacer_una_llamada_inicio+0xd0/0x4f0 [\u0026lt;00000000b389383b\u0026gt;] hacer_m\u00f3dulo_inicio+0x1a4/0x680 [\u0026lt;0000000087cf3542\u0026gt;] cargar_m\u00f3dulo+0x6249/0x7110 [\u0026lt;00000000beba61b8\u0026gt;] __hacer_m\u00f3dulo_finit_sys+0x140/0x200 [\u0026lt;00000000fdcfff51\u0026gt;] hacer_llamada_al_sistema_64+0x35/0x80 [\u0026lt;000000003c0f1f71\u0026gt;] entry_SYSCALL_64_after_hwframe+0x46/0xb0 Esto se debe a que q-\u0026gt;ma_ops se establece en NULL antes de llamar a blk_release_queue. blk_mq_init_queue_data blk_mq_init_allocated_queue blk_mq_realloc_hw_ctxs para (i = 0; i \u0026lt; set-\u0026gt;nr_hw_queues; i++) { old_hctx = xa_load(\u0026amp;q-\u0026gt;hctx_table, i); si (!blk_mq_alloc_and_init_hctx(.., i, ..)) [1] si (!old_hctx) break; xa_for_each_start(\u0026amp;q-\u0026gt;hctx_table, j, hctx, j) blk_mq_exit_hctx(q, set, hctx, j); [2] if (!q-\u0026gt;nr_hw_queues) [3] goto err_hctxs; err_exit: q-\u0026gt;mq_ops = NULL; [4] blk_put_queue blk_release_queue if (queue_is_mq(q)) [5] blk_mq_release(q); [1]: blk_mq_alloc_and_init_hctx fall\u00f3 en i != 0. [2]: Los hctxs asignados por [1] se mueven a q-\u0026gt;unused_hctx_list y se limpiar\u00e1n en blk_mq_release. [3]: q-\u0026gt;nr_hw_queues es 0. [4]: Establece q-\u0026gt;mq_ops en NULL. [5]: queue_is_mq devuelve falso debido a [4]. No se llamar\u00e1 a blk_mq_release. Los hctxs en q-\u0026gt;unused_hctx_list tienen fugas. Para solucionarlo, llame a blk_release_queue en la ruta de excepci\u00f3n.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2dc97e15a54b7bdf457848aa8c663c98a24e58a6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/943f45b9399ed8b2b5190cbc797995edaa97f58f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}