CVE-2025-38628

{
  "id": "CVE-2025-38628",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "83e445e64f48bdae3f25013e788fcf592f142576",
              "lessThan": "37f26b9013b46457b0a96633fc3a7dc977d8beb1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "83e445e64f48bdae3f25013e788fcf592f142576",
              "lessThan": "cf4fc23d0d3d5b89b36f0d79f2674510bb574d8e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "83e445e64f48bdae3f25013e788fcf592f142576",
              "lessThan": "6de4ef950dd56a6a81daf92d8a1d864fc6a56971",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "83e445e64f48bdae3f25013e788fcf592f142576",
              "lessThan": "cc51a66815999afb7e9cd845968de4fdf07567b7",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/vdpa/mlx5/core/mr.c",
            "drivers/vdpa/mlx5/net/mlx5_vnet.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.12",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.42",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.15.10",
              "versionType": "semver",
              "lessThanOrEqual": "6.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.16.1",
              "versionType": "semver",
              "lessThanOrEqual": "6.16.*"
            },
            {
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/vdpa/mlx5/core/mr.c",
            "drivers/vdpa/mlx5/net/mlx5_vnet.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-08-22T16:15:36.470",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/37f26b9013b46457b0a96633fc3a7dc977d8beb1",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6de4ef950dd56a6a81daf92d8a1d864fc6a56971",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cc51a66815999afb7e9cd845968de4fdf07567b7",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cf4fc23d0d3d5b89b36f0d79f2674510bb574d8e",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa/mlx5: Fix release of uninitialized resources on error path\n\nThe commit in the fixes tag made sure that mlx5_vdpa_free()\nis the single entrypoint for removing the vdpa device resources\nadded in mlx5_vdpa_dev_add(), even in the cleanup path of\nmlx5_vdpa_dev_add().\n\nThis means that all functions from mlx5_vdpa_free() should be able to\nhandle uninitialized resources. This was not the case though:\nmlx5_vdpa_destroy_mr_resources() and mlx5_cmd_cleanup_async_ctx()\nwere not able to do so. This caused the splat below when adding\na vdpa device without a MAC address.\n\nThis patch fixes these remaining issues:\n\n- Makes mlx5_vdpa_destroy_mr_resources() return early if called on\n  uninitialized resources.\n\n- Moves mlx5_cmd_init_async_ctx() early on during device addition\n  because it can't fail. This means that mlx5_cmd_cleanup_async_ctx()\n  also can't fail. To mirror this, move the call site of\n  mlx5_cmd_cleanup_async_ctx() in mlx5_vdpa_free().\n\nAn additional comment was added in mlx5_vdpa_free() to document\nthe expectations of functions called from this context.\n\nSplat:\n\n  mlx5_core 0000:b5:03.2: mlx5_vdpa_dev_add:3950:(pid 2306) warning: No mac address provisioned?\n  ------------[ cut here ]------------\n  WARNING: CPU: 13 PID: 2306 at kernel/workqueue.c:4207 __flush_work+0x9a/0xb0\n  [...]\n  Call Trace:\n   <TASK>\n   ? __try_to_del_timer_sync+0x61/0x90\n   ? __timer_delete_sync+0x2b/0x40\n   mlx5_vdpa_destroy_mr_resources+0x1c/0x40 [mlx5_vdpa]\n   mlx5_vdpa_free+0x45/0x160 [mlx5_vdpa]\n   vdpa_release_dev+0x1e/0x50 [vdpa]\n   device_release+0x31/0x90\n   kobject_cleanup+0x37/0x130\n   mlx5_vdpa_dev_add+0x327/0x890 [mlx5_vdpa]\n   vdpa_nl_cmd_dev_add_set_doit+0x2c1/0x4d0 [vdpa]\n   genl_family_rcv_msg_doit+0xd8/0x130\n   genl_family_rcv_msg+0x14b/0x220\n   ? __pfx_vdpa_nl_cmd_dev_add_set_doit+0x10/0x10 [vdpa]\n   genl_rcv_msg+0x47/0xa0\n   ? __pfx_genl_rcv_msg+0x10/0x10\n   netlink_rcv_skb+0x53/0x100\n   genl_rcv+0x24/0x40\n   netlink_unicast+0x27b/0x3b0\n   netlink_sendmsg+0x1f7/0x430\n   __sys_sendto+0x1fa/0x210\n   ? ___pte_offset_map+0x17/0x160\n   ? next_uptodate_folio+0x85/0x2b0\n   ? percpu_counter_add_batch+0x51/0x90\n   ? filemap_map_pages+0x515/0x660\n   __x64_sys_sendto+0x20/0x30\n   do_syscall_64+0x7b/0x2c0\n   ? do_read_fault+0x108/0x220\n   ? do_pte_missing+0x14a/0x3e0\n   ? __handle_mm_fault+0x321/0x730\n   ? count_memcg_events+0x13f/0x180\n   ? handle_mm_fault+0x1fb/0x2d0\n   ? do_user_addr_fault+0x20c/0x700\n   ? syscall_exit_work+0x104/0x140\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n  RIP: 0033:0x7f0c25b0feca\n  [...]\n  ---[ end trace 0000000000000000 ]---"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vdpa/mlx5: Corrección de la liberación de recursos no inicializados en la ruta de error el commit en la etiqueta fixes aseguró que mlx5_vdpa_free() sea el único punto de entrada para eliminar los recursos del dispositivo vdpa agregados en mlx5_vdpa_dev_add(), incluso en la ruta de limpieza de mlx5_vdpa_dev_add(). Esto significa que todas las funciones de mlx5_vdpa_free() deberían poder manejar recursos no inicializados. Sin embargo, este no fue el caso: mlx5_vdpa_destroy_mr_resources() y mlx5_cmd_cleanup_async_ctx() no pudieron hacerlo. Esto causó el splat a continuación al agregar un dispositivo vdpa sin una dirección MAC. Este parche corrige estos problemas restantes: - Hace que mlx5_vdpa_destroy_mr_resources() regrese antes si se llama en recursos no inicializados. - Se mueve mlx5_cmd_init_async_ctx() al principio de la adición del dispositivo, ya que no puede fallar. Esto significa que mlx5_cmd_cleanup_async_ctx() tampoco puede fallar. Para reflejar esto, mueva el sitio de llamada de mlx5_cmd_cleanup_async_ctx() a mlx5_vdpa_free(). Se añadió un comentario adicional en mlx5_vdpa_free() para documentar las expectativas de las funciones llamadas desde este contexto. Splat: mlx5_core 0000:b5:03.2: mlx5_vdpa_dev_add:3950:(pid 2306) advertencia: ¿No se ha proporcionado ninguna dirección MAC? ------------[ cortar aquí ]------------ ADVERTENCIA: CPU: 13 PID: 2306 en kernel/workqueue.c:4207 __flush_work+0x9a/0xb0 [...] Rastreo de llamadas:  ? __try_to_del_timer_sync+0x61/0x90 ? __timer_delete_sync+0x2b/0x40 mlx5_vdpa_destroy_mr_resources+0x1c/0x40 [mlx5_vdpa] mlx5_vdpa_free+0x45/0x160 [mlx5_vdpa] vdpa_release_dev+0x1e/0x50 [vdpa] device_release+0x31/0x90 kobject_cleanup+0x37/0x130 mlx5_vdpa_dev_add+0x327/0x890 [mlx5_vdpa] vdpa_nl_cmd_dev_add_set_doit+0x2c1/0x4d0 [vdpa] genl_family_rcv_msg_doit+0xd8/0x130 genl_family_rcv_msg+0x14b/0x220 ? __pfx_vdpa_nl_cmd_dev_add_set_doit+0x10/0x10 [vdpa] genl_rcv_msg+0x47/0xa0 ? __pfx_genl_rcv_msg+0x10/0x10 netlink_rcv_skb+0x53/0x100 genl_rcv+0x24/0x40 netlink_unicast+0x27b/0x3b0 netlink_sendmsg+0x1f7/0x430 __sys_sendto+0x1fa/0x210 ? ___pte_offset_map+0x17/0x160 ? next_uptodate_folio+0x85/0x2b0 ? percpu_counter_add_batch+0x51/0x90 ? filemap_map_pages+0x515/0x660 __x64_sys_sendto+0x20/0x30 do_syscall_64+0x7b/0x2c0 ? do_read_fault+0x108/0x220 ? do_pte_missing+0x14a/0x3e0 ? __handle_mm_fault+0x321/0x730 ? count_memcg_events+0x13f/0x180 ? handle_mm_fault+0x1fb/0x2d0 ? do_user_addr_fault+0x20c/0x700 ? syscall_exit_work+0x104/0x140 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f0c25b0feca [...] ---[ fin de seguimiento 0000000000000000 ]---"
    }
  ],
  "lastModified": "2026-06-17T09:17:14.850",
  "configurations": [
    {
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}