{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: Fix use-after-free with devm_spi_alloc_*\n\nWe can't rely on the contents of the devres list during\nspi_unregister_controller(), as the list is already torn down at the\ntime we perform devres_find() for devm_spi_release_controller. This\ncauses devices registered with devm_spi_alloc_{master,slave}() to be\nmistakenly identified as legacy, non-devm managed devices and have their\nreference counters decremented below 0.\n\n------------[ cut here ]------------\nWARNING: CPU: 1 PID: 660 at lib/refcount.c:28 refcount_warn_saturate+0x108/0x174\n[<b0396f04>] (refcount_warn_saturate) from [<b03c56a4>] (kobject_put+0x90/0x98)\n[<b03c5614>] (kobject_put) from [<b0447b4c>] (put_device+0x20/0x24)\n r4:b6700140\n[<b0447b2c>] (put_device) from [<b07515e8>] (devm_spi_release_controller+0x3c/0x40)\n[<b07515ac>] (devm_spi_release_controller) from [<b045343c>] (release_nodes+0x84/0xc4)\n r5:b6700180 r4:b6700100\n[<b04533b8>] (release_nodes) from [<b0454160>] (devres_release_all+0x5c/0x60)\n r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10\n[<b0454104>] (devres_release_all) from [<b044e41c>] (__device_release_driver+0x144/0x1ec)\n r5:b117ad94 r4:b163dc10\n[<b044e2d8>] (__device_release_driver) from [<b044f70c>] (device_driver_detach+0x84/0xa0)\n r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10\n[<b044f688>] (device_driver_detach) from [<b044d274>] (unbind_store+0xe4/0xf8)\n\nInstead, determine the devm allocation state as a flag on the\ncontroller which is guaranteed to be stable during cleanup."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/spi/spi.c",
                  "include/linux/spi/spi.h"
               ],
               "versions": [
                  {
                     "version": "a4add022c155",
                     "lessThan": "62bb2c7f2411",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "0870525cf94b",
                     "lessThan": "8bf96425c90f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8c45a1c6c951",
                     "lessThan": "8e029707f50a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "234b432c7b61",
                     "lessThan": "28a5529068c5",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "3e04a4976add",
                     "lessThan": "001c8e83646a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "5e844cc37a5c",
                     "lessThan": "c7fabe372a90",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "5e844cc37a5c",
                     "lessThan": "cee78aa24578",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "5e844cc37a5c",
                     "lessThan": "8735248ebb91",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "5e844cc37a5c",
                     "lessThan": "794aaf01444d",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/spi/spi.c",
                  "include/linux/spi/spi.h"
               ],
               "versions": [
                  {
                     "version": "5.10",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.10",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.4.271",
                     "lessThanOrEqual": "4.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.271",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.233",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.191",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.119",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.37",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.11.21",
                     "lessThanOrEqual": "5.11.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.4",
                     "lessThanOrEqual": "5.12.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.13",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815"
            },
            {
               "url": "https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e"
            },
            {
               "url": "https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c"
            },
            {
               "url": "https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4"
            },
            {
               "url": "https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74"
            },
            {
               "url": "https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1"
            },
            {
               "url": "https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7"
            },
            {
               "url": "https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6"
            },
            {
               "url": "https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9"
            }
         ],
         "title": "spi: Fix use-after-free with devm_spi_alloc_*",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-46959",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}