{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: n_gsm: fix possible out-of-bounds in gsm0_receive()\n\nAssuming the following:\n- side A configures the n_gsm in basic option mode\n- side B sends the header of a basic option mode frame with data length 1\n- side A switches to advanced option mode\n- side B sends 2 data bytes which exceeds gsm->len\n  Reason: gsm->len is not used in advanced option mode.\n- side A switches to basic option mode\n- side B keeps sending until gsm0_receive() writes past gsm->buf\n  Reason: Neither gsm->state nor gsm->len have been reset after\n  reconfiguration.\n\nFix this by changing gsm->count to gsm->len comparison from equal to less\nthan. Also add upper limit checks against the constant MAX_MRU in\ngsm0_receive() and gsm1_receive() to harden against memory corruption of\ngsm->len and gsm->mru.\n\nAll other checks remain as we still need to limit the data according to the\nuser configuration and actual payload size."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/tty/n_gsm.c"
               ],
               "versions": [
                  {
                     "version": "e1eaea46bb40",
                     "lessThan": "9513d4148950",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e1eaea46bb40",
                     "lessThan": "b229bc6c6ea9",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e1eaea46bb40",
                     "lessThan": "0fb736c9931e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e1eaea46bb40",
                     "lessThan": "4c267110fc11",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e1eaea46bb40",
                     "lessThan": "46f52c89a7e7",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e1eaea46bb40",
                     "lessThan": "774d83b008ec",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e1eaea46bb40",
                     "lessThan": "f126ce7305fe",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e1eaea46bb40",
                     "lessThan": "b890d45aaf02",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e1eaea46bb40",
                     "lessThan": "47388e807f85",
                     "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/tty/n_gsm.c"
               ],
               "versions": [
                  {
                     "version": "2.6.35",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "2.6.35",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.316",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.278",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.219",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.161",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.93",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.33",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8.12",
                     "lessThanOrEqual": "6.8.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.9.3",
                     "lessThanOrEqual": "6.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.10",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/9513d4148950b05bc99fa7314dc883cc0e1605e5"
            },
            {
               "url": "https://git.kernel.org/stable/c/b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56"
            },
            {
               "url": "https://git.kernel.org/stable/c/0fb736c9931e02dbc7d9a75044c8e1c039e50f04"
            },
            {
               "url": "https://git.kernel.org/stable/c/4c267110fc110390704cc065edb9817fdd10ff54"
            },
            {
               "url": "https://git.kernel.org/stable/c/46f52c89a7e7d2691b97a9728e4591d071ca8abc"
            },
            {
               "url": "https://git.kernel.org/stable/c/774d83b008eccb1c48c14dc5486e7aa255731350"
            },
            {
               "url": "https://git.kernel.org/stable/c/f126ce7305fe88f49cdabc6db4168b9318898ea3"
            },
            {
               "url": "https://git.kernel.org/stable/c/b890d45aaf02b564e6cae2d2a590f9649330857d"
            },
            {
               "url": "https://git.kernel.org/stable/c/47388e807f85948eefc403a8a5fdc5b406a65d5a"
            }
         ],
         "title": "tty: n_gsm: fix possible out-of-bounds in gsm0_receive()",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-36016",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}