CVE-2025-38628 (GCVE-0-2025-38628)

Vulnerability from cvelistv5 – Published: 2025-08-22 16:00 – Updated: 2025-09-29 05:55
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: vdpa/mlx5: Fix release of uninitialized resources on error path The commit in the fixes tag made sure that mlx5_vdpa_free() is the single entrypoint for removing the vdpa device resources added in mlx5_vdpa_dev_add(), even in the cleanup path of mlx5_vdpa_dev_add(). This means that all functions from mlx5_vdpa_free() should be able to handle uninitialized resources. This was not the case though: mlx5_vdpa_destroy_mr_resources() and mlx5_cmd_cleanup_async_ctx() were not able to do so. This caused the splat below when adding a vdpa device without a MAC address. This patch fixes these remaining issues: - Makes mlx5_vdpa_destroy_mr_resources() return early if called on uninitialized resources. - Moves mlx5_cmd_init_async_ctx() early on during device addition because it can't fail. This means that mlx5_cmd_cleanup_async_ctx() also can't fail. To mirror this, move the call site of mlx5_cmd_cleanup_async_ctx() in mlx5_vdpa_free(). An additional comment was added in mlx5_vdpa_free() to document the expectations of functions called from this context. Splat: mlx5_core 0000:b5:03.2: mlx5_vdpa_dev_add:3950:(pid 2306) warning: No mac address provisioned? ------------[ cut here ]------------ WARNING: CPU: 13 PID: 2306 at kernel/workqueue.c:4207 __flush_work+0x9a/0xb0 [...] Call Trace: <TASK> ? __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 [...] ---[ end trace 0000000000000000 ]---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 83e445e64f48bdae3f25013e788fcf592f142576 , < 37f26b9013b46457b0a96633fc3a7dc977d8beb1 (git)
Affected: 83e445e64f48bdae3f25013e788fcf592f142576 , < cf4fc23d0d3d5b89b36f0d79f2674510bb574d8e (git)
Affected: 83e445e64f48bdae3f25013e788fcf592f142576 , < 6de4ef950dd56a6a81daf92d8a1d864fc6a56971 (git)
Affected: 83e445e64f48bdae3f25013e788fcf592f142576 , < cc51a66815999afb7e9cd845968de4fdf07567b7 (git)
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    Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.42 , ≤ 6.12.* (semver)
Unaffected: 6.15.10 , ≤ 6.15.* (semver)
Unaffected: 6.16.1 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/mlx5/core/mr.c",
            "drivers/vdpa/mlx5/net/mlx5_vnet.c"
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          "product": "Linux",
          "programFiles": [
            "drivers/vdpa/mlx5/core/mr.c",
            "drivers/vdpa/mlx5/net/mlx5_vnet.c"
          ],
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          "vendor": "Linux",
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      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "vulnerable": true
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              "operator": "OR"
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      "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\u0027t fail. This means that mlx5_cmd_cleanup_async_ctx()\n  also can\u0027t 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   \u003cTASK\u003e\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 ]---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-29T05:55:06.134Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/37f26b9013b46457b0a96633fc3a7dc977d8beb1"
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          "url": "https://git.kernel.org/stable/c/cf4fc23d0d3d5b89b36f0d79f2674510bb574d8e"
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        },
        {
          "url": "https://git.kernel.org/stable/c/cc51a66815999afb7e9cd845968de4fdf07567b7"
        }
      ],
      "title": "vdpa/mlx5: Fix release of uninitialized resources on error path",
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38628",
    "datePublished": "2025-08-22T16:00:36.841Z",
    "dateReserved": "2025-04-16T04:51:24.029Z",
    "dateUpdated": "2025-09-29T05:55:06.134Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38628\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-22T16:15:36.470\",\"lastModified\":\"2025-11-26T17:09:59.197\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"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\u0027t fail. This means that mlx5_cmd_cleanup_async_ctx()\\n  also can\u0027t 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   \u003cTASK\u003e\\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: Correcci\u00f3n de la liberaci\u00f3n de recursos no inicializados en la ruta de error el commit en la etiqueta fixes asegur\u00f3 que mlx5_vdpa_free() sea el \u00fanico 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() deber\u00edan 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 caus\u00f3 el splat a continuaci\u00f3n al agregar un dispositivo vdpa sin una direcci\u00f3n 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 adici\u00f3n 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 a\u00f1adi\u00f3 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: \u00bfNo se ha proporcionado ninguna direcci\u00f3n MAC? ------------[ cortar aqu\u00ed ]------------ 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 ]---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.12.1\",\"versionEndExcluding\":\"6.12.42\",\"matchCriteriaId\":\"5EB0B979-24B9-47D9-8239-A091CAD681B3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.15.10\",\"matchCriteriaId\":\"5890C690-B295-40C2-9121-FF5F987E5142\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.16\",\"versionEndExcluding\":\"6.16.1\",\"matchCriteriaId\":\"58182352-D7DF-4CC9-841E-03C1D852C3FB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"0E698080-7669-4132-8817-4C674EEBCE54\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/37f26b9013b46457b0a96633fc3a7dc977d8beb1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6de4ef950dd56a6a81daf92d8a1d864fc6a56971\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cc51a66815999afb7e9cd845968de4fdf07567b7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cf4fc23d0d3d5b89b36f0d79f2674510bb574d8e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.