{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tls: Fix flipped sign in tls_err_abort() calls\n\nsk->sk_err appears to expect a positive value, a convention that ktls\ndoesn't always follow and that leads to memory corruption in other code.\nFor instance,\n\n    [kworker]\n    tls_encrypt_done(..., err=<negative error from crypto request>)\n      tls_err_abort(.., err)\n        sk->sk_err = err;\n\n    [task]\n    splice_from_pipe_feed\n      ...\n        tls_sw_do_sendpage\n          if (sk->sk_err) {\n            ret = -sk->sk_err;  // ret is positive\n\n    splice_from_pipe_feed (continued)\n      ret = actor(...)  // ret is still positive and interpreted as bytes\n                        // written, resulting in underflow of buf->len and\n                        // sd->len, leading to huge buf->offset and bogus\n                        // addresses computed in later calls to actor()\n\nFix all tls_err_abort() callers to pass a negative error code\nconsistently and centralize the error-prone sign flip there, throwing in\na warning to catch future misuse and uninlining the function so it\nreally does only warn once."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "include/net/tls.h",
                  "net/tls/tls_sw.c"
               ],
               "versions": [
                  {
                     "version": "c46234ebb4d1",
                     "lessThan": "e0cfd5159f31",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c46234ebb4d1",
                     "lessThan": "f3dec7e7ace3",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c46234ebb4d1",
                     "lessThan": "e41473543f75",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c46234ebb4d1",
                     "lessThan": "da353fac65fe",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "include/net/tls.h",
                  "net/tls/tls_sw.c"
               ],
               "versions": [
                  {
                     "version": "4.17",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "4.17",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.157",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.77",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.14.16",
                     "lessThanOrEqual": "5.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/e0cfd5159f314d6b304d030363650b06a2299cbb"
            },
            {
               "url": "https://git.kernel.org/stable/c/f3dec7e7ace38224f82cf83f0049159d067c2e19"
            },
            {
               "url": "https://git.kernel.org/stable/c/e41473543f75f7dbc5d605007e6f883f1bd13b9a"
            },
            {
               "url": "https://git.kernel.org/stable/c/da353fac65fede6b8b4cfe207f0d9408e3121105"
            }
         ],
         "title": "net/tls: Fix flipped sign in tls_err_abort() calls",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47496",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}