{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Fix a use after free in siw_alloc_mr\n\nOur code analyzer reported a UAF.\n\nIn siw_alloc_mr(), it calls siw_mr_add_mem(mr,..). In the implementation of\nsiw_mr_add_mem(), mem is assigned to mr->mem and then mem is freed via\nkfree(mem) if xa_alloc_cyclic() failed. Here, mr->mem still point to a\nfreed object. After, the execution continue up to the err_out branch of\nsiw_alloc_mr, and the freed mr->mem is used in siw_mr_drop_mem(mr).\n\nMy patch moves \"mr->mem = mem\" behind the if (xa_alloc_cyclic(..)<0) {}\nsection, to avoid the uaf."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/infiniband/sw/siw/siw_mem.c"
               ],
               "versions": [
                  {
                     "version": "2251334dcac9",
                     "lessThan": "30b9e92d0b5e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2251334dcac9",
                     "lessThan": "608a4b90ece0",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2251334dcac9",
                     "lessThan": "3e22b88e02c1",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2251334dcac9",
                     "lessThan": "ad9ce7188432",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2251334dcac9",
                     "lessThan": "3093ee182f01",
                     "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/infiniband/sw/siw/siw_mem.c"
               ],
               "versions": [
                  {
                     "version": "5.3",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.3",
                     "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/30b9e92d0b5e5d5dc1101ab856c17009537cbca4"
            },
            {
               "url": "https://git.kernel.org/stable/c/608a4b90ece039940e9425ee2b39c8beff27e00c"
            },
            {
               "url": "https://git.kernel.org/stable/c/3e22b88e02c194f6c80867abfef5cc09383461f4"
            },
            {
               "url": "https://git.kernel.org/stable/c/ad9ce7188432650469a6c7625bf479f5ed0b6155"
            },
            {
               "url": "https://git.kernel.org/stable/c/3093ee182f01689b89e9f8797b321603e5de4f63"
            }
         ],
         "title": "RDMA/siw: Fix a use after free in siw_alloc_mr",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47012",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}