{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "BPF interpreter"
          ],
          "product": "libpcap",
          "programFiles": [
            "bpf_filter.c"
          ],
          "programRoutines": [
            {
              "name": "pcapint_filter_with_aux_data()"
            }
          ],
          "repo": "https://github.com/the-tcpdump-group/libpcap/",
          "vendor": "The Tcpdump Group",
          "versions": [
            {
              "lessThan": "1.10.7",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "The problem is specific to applications that use pcap_offline_filter() or bpf_filter() with an externally-supplied compiled filter program without validating the program first."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "sponsor",
          "value": "Mozilla via the Secure Open Source program"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "Include Security"
        },
        {
          "lang": "en",
          "type": "analyst",
          "value": "Denis Ovsienko"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value.  In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "A functional exploit exists."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-129",
              "description": "CWE-129 Improper Validation of Array Index",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125 Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787 Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-05T18:48:39.126Z",
        "orgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896",
        "shortName": "Tcpdump"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/the-tcpdump-group/libpcap/commit/48e8960a7108e9e828f9d7bdc7e97bdab841aec7"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to libpcap 1.10.7."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "OOBR and OOBW in libpcap before 1.10.7",
      "workarounds": [
        {
          "lang": "en",
          "value": "Validate every filter program that has not been produced by a local call to pcap_compile()."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896",
    "assignerShortName": "Tcpdump",
    "cveId": "CVE-2026-0799",
    "datePublished": "2026-09-05T18:48:39.126Z",
    "dateReserved": "2026-01-08T23:19:31.855Z",
    "dateUpdated": "2026-09-05T18:48:39.126Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-0799",
      "date": "2026-09-06",
      "epss": "0.00107",
      "percentile": "0.01231"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-0799\",\"sourceIdentifier\":\"security@tcpdump.org\",\"published\":\"2026-09-05T19:16:55.320\",\"lastModified\":\"2026-09-05T19:16:55.320\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value.  In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.\"}],\"affected\":[{\"source\":\"security@tcpdump.org\",\"affectedData\":[{\"vendor\":\"The Tcpdump Group\",\"product\":\"libpcap\",\"defaultStatus\":\"unaffected\",\"modules\":[\"BPF interpreter\"],\"programFiles\":[\"bpf_filter.c\"],\"programRoutines\":[{\"name\":\"pcapint_filter_with_aux_data()\"}],\"repo\":\"https://github.com/the-tcpdump-group/libpcap/\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"1.10.7\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@tcpdump.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H\",\"baseScore\":8.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.0,\"impactScore\":6.0}]},\"weaknesses\":[{\"source\":\"security@tcpdump.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"},{\"lang\":\"en\",\"value\":\"CWE-129\"},{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"references\":[{\"url\":\"https://github.com/the-tcpdump-group/libpcap/commit/48e8960a7108e9e828f9d7bdc7e97bdab841aec7\",\"source\":\"security@tcpdump.org\"}]}}"
  }
}