CVE-2023-53235 (GCVE-0-2023-53235)
Vulnerability from cvelistv5
Published
2025-09-15 14:22
Modified
2025-09-15 14:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/tests: helpers: Avoid a driver uaf when using __drm_kunit_helper_alloc_drm_device() the driver may be dereferenced by device-managed resources up until the device is freed, which is typically later than the kunit-managed resource code frees it. Fix this by simply make the driver device-managed as well. In short, the sequence leading to the UAF is as follows: INIT: Code allocates a struct device as a kunit-managed resource. Code allocates a drm driver as a kunit-managed resource. Code allocates a drm device as a device-managed resource. EXIT: Kunit resource cleanup frees the drm driver Kunit resource cleanup puts the struct device, which starts a device-managed resource cleanup device-managed cleanup calls drm_dev_put() drm_dev_put() dereferences the (now freed) drm driver -> Boom. Related KASAN message: [55272.551542] ================================================================== [55272.551551] BUG: KASAN: slab-use-after-free in drm_dev_put.part.0+0xd4/0xe0 [drm] [55272.551603] Read of size 8 at addr ffff888127502828 by task kunit_try_catch/10353 [55272.551612] CPU: 4 PID: 10353 Comm: kunit_try_catch Tainted: G U N 6.5.0-rc7+ #155 [55272.551620] Hardware name: ASUS System Product Name/PRIME B560M-A AC, BIOS 0403 01/26/2021 [55272.551626] Call Trace: [55272.551629] <TASK> [55272.551633] dump_stack_lvl+0x57/0x90 [55272.551639] print_report+0xcf/0x630 [55272.551645] ? _raw_spin_lock_irqsave+0x5f/0x70 [55272.551652] ? drm_dev_put.part.0+0xd4/0xe0 [drm] [55272.551694] kasan_report+0xd7/0x110 [55272.551699] ? drm_dev_put.part.0+0xd4/0xe0 [drm] [55272.551742] drm_dev_put.part.0+0xd4/0xe0 [drm] [55272.551783] devres_release_all+0x15d/0x1f0 [55272.551790] ? __pfx_devres_release_all+0x10/0x10 [55272.551797] device_unbind_cleanup+0x16/0x1a0 [55272.551802] device_release_driver_internal+0x3e5/0x540 [55272.551808] ? kobject_put+0x5d/0x4b0 [55272.551814] bus_remove_device+0x1f1/0x3f0 [55272.551819] device_del+0x342/0x910 [55272.551826] ? __pfx_device_del+0x10/0x10 [55272.551830] ? lock_release+0x339/0x5e0 [55272.551836] ? kunit_remove_resource+0x128/0x290 [kunit] [55272.551845] ? __pfx_lock_release+0x10/0x10 [55272.551851] platform_device_del.part.0+0x1f/0x1e0 [55272.551856] ? _raw_spin_unlock_irqrestore+0x30/0x60 [55272.551863] kunit_remove_resource+0x195/0x290 [kunit] [55272.551871] ? _raw_spin_unlock_irqrestore+0x30/0x60 [55272.551877] kunit_cleanup+0x78/0x120 [kunit] [55272.551885] ? __kthread_parkme+0xc1/0x1f0 [55272.551891] ? __pfx_kunit_try_run_case_cleanup+0x10/0x10 [kunit] [55272.551900] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [kunit] [55272.551909] kunit_generic_run_threadfn_adapter+0x4a/0x90 [kunit] [55272.551919] kthread+0x2e7/0x3c0 [55272.551924] ? __pfx_kthread+0x10/0x10 [55272.551929] ret_from_fork+0x2d/0x70 [55272.551935] ? __pfx_kthread+0x10/0x10 [55272.551940] ret_from_fork_asm+0x1b/0x30 [55272.551948] </TASK> [55272.551953] Allocated by task 10351: [55272.551956] kasan_save_stack+0x1c/0x40 [55272.551962] kasan_set_track+0x21/0x30 [55272.551966] __kasan_kmalloc+0x8b/0x90 [55272.551970] __kmalloc+0x5e/0x160 [55272.551976] kunit_kmalloc_array+0x1c/0x50 [kunit] [55272.551984] drm_exec_test_init+0xfa/0x2c0 [drm_exec_test] [55272.551991] kunit_try_run_case+0xdd/0x250 [kunit] [55272.551999] kunit_generic_run_threadfn_adapter+0x4a/0x90 [kunit] [55272.552008] kthread+0x2e7/0x3c0 [55272.552012] ret_from_fork+0x2d/0x70 [55272.552017] ret_from_fork_asm+0x1b/0x30 [55272.552024] Freed by task 10353: [55272.552027] kasan_save_stack+0x1c/0x40 [55272.552032] kasan_set_track+0x21/0x30 [55272.552036] kasan_save_free_info+0x27/0x40 [55272.552041] __kasan_slab_free+0x106/0x180 [55272.552046] slab_free_freelist_hook+0xb3/0x160 [55272.552051] __kmem_cache_free+0xb2/0x290 [55272.552056] kunit_remove_resource+0x195/0x290 [kunit] [55272.552064] kunit_cleanup+0x7 ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/139a27854bf5ce93ff9805f9f7683b88c13074dc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c9d8be0e533738b744abb669263c4750d4830009
Impacted products
Vendor Product Version
Linux Linux Version: d98780310719bf4076d975c2ff65c44c7c0d929e
Version: d98780310719bf4076d975c2ff65c44c7c0d929e
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   Linux Linux Version: 6.3
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/drm/drm_kunit_helpers.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c9d8be0e533738b744abb669263c4750d4830009",
              "status": "affected",
              "version": "d98780310719bf4076d975c2ff65c44c7c0d929e",
              "versionType": "git"
            },
            {
              "lessThan": "139a27854bf5ce93ff9805f9f7683b88c13074dc",
              "status": "affected",
              "version": "d98780310719bf4076d975c2ff65c44c7c0d929e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/drm/drm_kunit_helpers.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.3"
            },
            {
              "lessThan": "6.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.5.*",
              "status": "unaffected",
              "version": "6.5.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5.5",
                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6",
                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/tests: helpers: Avoid a driver uaf\n\nwhen using __drm_kunit_helper_alloc_drm_device() the driver may be\ndereferenced by device-managed resources up until the device is\nfreed, which is typically later than the kunit-managed resource code\nfrees it. Fix this by simply make the driver device-managed as well.\n\nIn short, the sequence leading to the UAF is as follows:\n\nINIT:\nCode allocates a struct device as a kunit-managed resource.\nCode allocates a drm driver as a kunit-managed resource.\nCode allocates a drm device as a device-managed resource.\n\nEXIT:\nKunit resource cleanup frees the drm driver\nKunit resource cleanup puts the struct device, which starts a\n      device-managed resource cleanup\ndevice-managed cleanup calls drm_dev_put()\ndrm_dev_put() dereferences the (now freed) drm driver -\u003e Boom.\n\nRelated KASAN message:\n[55272.551542] ==================================================================\n[55272.551551] BUG: KASAN: slab-use-after-free in drm_dev_put.part.0+0xd4/0xe0 [drm]\n[55272.551603] Read of size 8 at addr ffff888127502828 by task kunit_try_catch/10353\n\n[55272.551612] CPU: 4 PID: 10353 Comm: kunit_try_catch Tainted: G     U           N 6.5.0-rc7+ #155\n[55272.551620] Hardware name: ASUS System Product Name/PRIME B560M-A AC, BIOS 0403 01/26/2021\n[55272.551626] Call Trace:\n[55272.551629]  \u003cTASK\u003e\n[55272.551633]  dump_stack_lvl+0x57/0x90\n[55272.551639]  print_report+0xcf/0x630\n[55272.551645]  ? _raw_spin_lock_irqsave+0x5f/0x70\n[55272.551652]  ? drm_dev_put.part.0+0xd4/0xe0 [drm]\n[55272.551694]  kasan_report+0xd7/0x110\n[55272.551699]  ? drm_dev_put.part.0+0xd4/0xe0 [drm]\n[55272.551742]  drm_dev_put.part.0+0xd4/0xe0 [drm]\n[55272.551783]  devres_release_all+0x15d/0x1f0\n[55272.551790]  ? __pfx_devres_release_all+0x10/0x10\n[55272.551797]  device_unbind_cleanup+0x16/0x1a0\n[55272.551802]  device_release_driver_internal+0x3e5/0x540\n[55272.551808]  ? kobject_put+0x5d/0x4b0\n[55272.551814]  bus_remove_device+0x1f1/0x3f0\n[55272.551819]  device_del+0x342/0x910\n[55272.551826]  ? __pfx_device_del+0x10/0x10\n[55272.551830]  ? lock_release+0x339/0x5e0\n[55272.551836]  ? kunit_remove_resource+0x128/0x290 [kunit]\n[55272.551845]  ? __pfx_lock_release+0x10/0x10\n[55272.551851]  platform_device_del.part.0+0x1f/0x1e0\n[55272.551856]  ? _raw_spin_unlock_irqrestore+0x30/0x60\n[55272.551863]  kunit_remove_resource+0x195/0x290 [kunit]\n[55272.551871]  ? _raw_spin_unlock_irqrestore+0x30/0x60\n[55272.551877]  kunit_cleanup+0x78/0x120 [kunit]\n[55272.551885]  ? __kthread_parkme+0xc1/0x1f0\n[55272.551891]  ? __pfx_kunit_try_run_case_cleanup+0x10/0x10 [kunit]\n[55272.551900]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [kunit]\n[55272.551909]  kunit_generic_run_threadfn_adapter+0x4a/0x90 [kunit]\n[55272.551919]  kthread+0x2e7/0x3c0\n[55272.551924]  ? __pfx_kthread+0x10/0x10\n[55272.551929]  ret_from_fork+0x2d/0x70\n[55272.551935]  ? __pfx_kthread+0x10/0x10\n[55272.551940]  ret_from_fork_asm+0x1b/0x30\n[55272.551948]  \u003c/TASK\u003e\n\n[55272.551953] Allocated by task 10351:\n[55272.551956]  kasan_save_stack+0x1c/0x40\n[55272.551962]  kasan_set_track+0x21/0x30\n[55272.551966]  __kasan_kmalloc+0x8b/0x90\n[55272.551970]  __kmalloc+0x5e/0x160\n[55272.551976]  kunit_kmalloc_array+0x1c/0x50 [kunit]\n[55272.551984]  drm_exec_test_init+0xfa/0x2c0 [drm_exec_test]\n[55272.551991]  kunit_try_run_case+0xdd/0x250 [kunit]\n[55272.551999]  kunit_generic_run_threadfn_adapter+0x4a/0x90 [kunit]\n[55272.552008]  kthread+0x2e7/0x3c0\n[55272.552012]  ret_from_fork+0x2d/0x70\n[55272.552017]  ret_from_fork_asm+0x1b/0x30\n\n[55272.552024] Freed by task 10353:\n[55272.552027]  kasan_save_stack+0x1c/0x40\n[55272.552032]  kasan_set_track+0x21/0x30\n[55272.552036]  kasan_save_free_info+0x27/0x40\n[55272.552041]  __kasan_slab_free+0x106/0x180\n[55272.552046]  slab_free_freelist_hook+0xb3/0x160\n[55272.552051]  __kmem_cache_free+0xb2/0x290\n[55272.552056]  kunit_remove_resource+0x195/0x290 [kunit]\n[55272.552064]  kunit_cleanup+0x7\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:22:08.322Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c9d8be0e533738b744abb669263c4750d4830009"
        },
        {
          "url": "https://git.kernel.org/stable/c/139a27854bf5ce93ff9805f9f7683b88c13074dc"
        }
      ],
      "title": "drm/tests: helpers: Avoid a driver uaf",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53235",
    "datePublished": "2025-09-15T14:22:08.322Z",
    "dateReserved": "2025-09-15T14:19:21.847Z",
    "dateUpdated": "2025-09-15T14:22:08.322Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53235\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-15T15:15:50.550\",\"lastModified\":\"2025-09-15T15:22:27.090\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/tests: helpers: Avoid a driver uaf\\n\\nwhen using __drm_kunit_helper_alloc_drm_device() the driver may be\\ndereferenced by device-managed resources up until the device is\\nfreed, which is typically later than the kunit-managed resource code\\nfrees it. Fix this by simply make the driver device-managed as well.\\n\\nIn short, the sequence leading to the UAF is as follows:\\n\\nINIT:\\nCode allocates a struct device as a kunit-managed resource.\\nCode allocates a drm driver as a kunit-managed resource.\\nCode allocates a drm device as a device-managed resource.\\n\\nEXIT:\\nKunit resource cleanup frees the drm driver\\nKunit resource cleanup puts the struct device, which starts a\\n      device-managed resource cleanup\\ndevice-managed cleanup calls drm_dev_put()\\ndrm_dev_put() dereferences the (now freed) drm driver -\u003e Boom.\\n\\nRelated KASAN message:\\n[55272.551542] ==================================================================\\n[55272.551551] BUG: KASAN: slab-use-after-free in drm_dev_put.part.0+0xd4/0xe0 [drm]\\n[55272.551603] Read of size 8 at addr ffff888127502828 by task kunit_try_catch/10353\\n\\n[55272.551612] CPU: 4 PID: 10353 Comm: kunit_try_catch Tainted: G     U           N 6.5.0-rc7+ #155\\n[55272.551620] Hardware name: ASUS System Product Name/PRIME B560M-A AC, BIOS 0403 01/26/2021\\n[55272.551626] Call Trace:\\n[55272.551629]  \u003cTASK\u003e\\n[55272.551633]  dump_stack_lvl+0x57/0x90\\n[55272.551639]  print_report+0xcf/0x630\\n[55272.551645]  ? _raw_spin_lock_irqsave+0x5f/0x70\\n[55272.551652]  ? drm_dev_put.part.0+0xd4/0xe0 [drm]\\n[55272.551694]  kasan_report+0xd7/0x110\\n[55272.551699]  ? drm_dev_put.part.0+0xd4/0xe0 [drm]\\n[55272.551742]  drm_dev_put.part.0+0xd4/0xe0 [drm]\\n[55272.551783]  devres_release_all+0x15d/0x1f0\\n[55272.551790]  ? __pfx_devres_release_all+0x10/0x10\\n[55272.551797]  device_unbind_cleanup+0x16/0x1a0\\n[55272.551802]  device_release_driver_internal+0x3e5/0x540\\n[55272.551808]  ? kobject_put+0x5d/0x4b0\\n[55272.551814]  bus_remove_device+0x1f1/0x3f0\\n[55272.551819]  device_del+0x342/0x910\\n[55272.551826]  ? __pfx_device_del+0x10/0x10\\n[55272.551830]  ? lock_release+0x339/0x5e0\\n[55272.551836]  ? kunit_remove_resource+0x128/0x290 [kunit]\\n[55272.551845]  ? __pfx_lock_release+0x10/0x10\\n[55272.551851]  platform_device_del.part.0+0x1f/0x1e0\\n[55272.551856]  ? _raw_spin_unlock_irqrestore+0x30/0x60\\n[55272.551863]  kunit_remove_resource+0x195/0x290 [kunit]\\n[55272.551871]  ? _raw_spin_unlock_irqrestore+0x30/0x60\\n[55272.551877]  kunit_cleanup+0x78/0x120 [kunit]\\n[55272.551885]  ? __kthread_parkme+0xc1/0x1f0\\n[55272.551891]  ? __pfx_kunit_try_run_case_cleanup+0x10/0x10 [kunit]\\n[55272.551900]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [kunit]\\n[55272.551909]  kunit_generic_run_threadfn_adapter+0x4a/0x90 [kunit]\\n[55272.551919]  kthread+0x2e7/0x3c0\\n[55272.551924]  ? __pfx_kthread+0x10/0x10\\n[55272.551929]  ret_from_fork+0x2d/0x70\\n[55272.551935]  ? __pfx_kthread+0x10/0x10\\n[55272.551940]  ret_from_fork_asm+0x1b/0x30\\n[55272.551948]  \u003c/TASK\u003e\\n\\n[55272.551953] Allocated by task 10351:\\n[55272.551956]  kasan_save_stack+0x1c/0x40\\n[55272.551962]  kasan_set_track+0x21/0x30\\n[55272.551966]  __kasan_kmalloc+0x8b/0x90\\n[55272.551970]  __kmalloc+0x5e/0x160\\n[55272.551976]  kunit_kmalloc_array+0x1c/0x50 [kunit]\\n[55272.551984]  drm_exec_test_init+0xfa/0x2c0 [drm_exec_test]\\n[55272.551991]  kunit_try_run_case+0xdd/0x250 [kunit]\\n[55272.551999]  kunit_generic_run_threadfn_adapter+0x4a/0x90 [kunit]\\n[55272.552008]  kthread+0x2e7/0x3c0\\n[55272.552012]  ret_from_fork+0x2d/0x70\\n[55272.552017]  ret_from_fork_asm+0x1b/0x30\\n\\n[55272.552024] Freed by task 10353:\\n[55272.552027]  kasan_save_stack+0x1c/0x40\\n[55272.552032]  kasan_set_track+0x21/0x30\\n[55272.552036]  kasan_save_free_info+0x27/0x40\\n[55272.552041]  __kasan_slab_free+0x106/0x180\\n[55272.552046]  slab_free_freelist_hook+0xb3/0x160\\n[55272.552051]  __kmem_cache_free+0xb2/0x290\\n[55272.552056]  kunit_remove_resource+0x195/0x290 [kunit]\\n[55272.552064]  kunit_cleanup+0x7\\n---truncated---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/139a27854bf5ce93ff9805f9f7683b88c13074dc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c9d8be0e533738b744abb669263c4750d4830009\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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