{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Zero former ARG_PTR_TO_{LONG,INT} args in case of error\n\nFor all non-tracing helpers which formerly had ARG_PTR_TO_{LONG,INT} as input\narguments, zero the value for the case of an error as otherwise it could leak\nmemory. For tracing, it is not needed given CAP_PERFMON can already read all\nkernel memory anyway hence bpf_get_func_arg() and bpf_get_func_ret() is skipped\nin here.\n\nAlso, the MTU helpers mtu_len pointer value is being written but also read.\nTechnically, the MEM_UNINIT should not be there in order to always force init.\nRemoving MEM_UNINIT needs more verifier rework though: MEM_UNINIT right now\nimplies two things actually: i) write into memory, ii) memory does not have\nto be initialized. If we lift MEM_UNINIT, it then becomes: i) read into memory,\nii) memory must be initialized. This means that for bpf_*_check_mtu() we're\nreadding the issue we're trying to fix, that is, it would then be able to\nwrite back into things like .rodata BPF maps. Follow-up work will rework the\nMEM_UNINIT semantics such that the intent can be better expressed. For now\njust clear the *mtu_len on error path which can be lifted later again."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "kernel/bpf/helpers.c",
                  "kernel/bpf/syscall.c",
                  "net/core/filter.c"
               ],
               "versions": [
                  {
                     "version": "d7a4cb9b6705",
                     "lessThan": "8397bf78988f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "d7a4cb9b6705",
                     "lessThan": "a634fa8e480a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "d7a4cb9b6705",
                     "lessThan": "599d15b6d033",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "d7a4cb9b6705",
                     "lessThan": "594a9f5a8d2d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "d7a4cb9b6705",
                     "lessThan": "4b3786a6c539",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "kernel/bpf/helpers.c",
                  "kernel/bpf/syscall.c",
                  "net/core/filter.c"
               ],
               "versions": [
                  {
                     "version": "5.2",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.2",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.113",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.54",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.10.13",
                     "lessThanOrEqual": "6.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.11.2",
                     "lessThanOrEqual": "6.11.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.12-rc1",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/8397bf78988f3ae9dbebb0200189a62a57264980"
            },
            {
               "url": "https://git.kernel.org/stable/c/a634fa8e480ac2423f86311a602f6295df2c8ed0"
            },
            {
               "url": "https://git.kernel.org/stable/c/599d15b6d03356a97bff7a76155c5604c42a2962"
            },
            {
               "url": "https://git.kernel.org/stable/c/594a9f5a8d2de2573a856e506f77ba7dd2cefc6a"
            },
            {
               "url": "https://git.kernel.org/stable/c/4b3786a6c5397dc220b1483d8e2f4867743e966f"
            }
         ],
         "title": "bpf: Zero former ARG_PTR_TO_{LONG,INT} args in case of error",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-47728",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}