{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-0799", "assignerOrgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "state": "PUBLISHED", "assignerShortName": "Tcpdump", "dateReserved": "2026-01-08T23:19:31.855Z", "datePublished": "2026-09-05T18:48:39.126Z", "dateUpdated": "2026-09-05T18:48:39.126Z"}, "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": {"orgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "shortName": "Tcpdump", "dateUpdated": "2026-09-05T18:48:39.126Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "security@tcpdump.org"}], "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."}], "id": "CVE-2026-0799", "lastModified": "2026-09-05T19:16:55.320", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "security@tcpdump.org", "type": "Secondary"}]}, "published": "2026-09-05T19:16:55.320", "references": [{"source": "security@tcpdump.org", "url": "https://github.com/the-tcpdump-group/libpcap/commit/48e8960a7108e9e828f9d7bdc7e97bdab841aec7"}], "sourceIdentifier": "security@tcpdump.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-129"}, {"lang": "en", "value": "CWE-787"}], "source": "security@tcpdump.org", "type": "Secondary"}]}

{}

{"created": "2026-09-05T20:30:17.797107+00:00", "updated": "2026-09-05T20:30:17.797113+00:00", "vendors": []}