{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18238", "assignerOrgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "state": "PUBLISHED", "assignerShortName": "Tcpdump", "dateReserved": "2026-07-29T13:32:44.322Z", "datePublished": "2026-09-05T18:51:57.956Z", "dateUpdated": "2026-09-05T18:51:57.956Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "modules": ["remote packet capture client"], "product": "libpcap", "programFiles": ["pcap-rpcap.c"], "programRoutines": [{"name": "pcap_read_nocb_remote()"}], "repo": "https://github.com/the-tcpdump-group/libpcap/", "vendor": "The Tcpdump Group", "versions": [{"status": "affected", "version": "1.8.x"}, {"status": "affected", "version": "1.9.x"}, {"lessThan": "1.10.7", "status": "affected", "version": "1.10.x", "versionType": "semver"}]}], "configurations": [{"lang": "en", "value": "The problem is specific to the remote packet capture code, which is not enabled in the default build configuration."}], "descriptions": [{"lang": "en", "value": "The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly validates its headers. A malicious server can send a crafted message and cause the client to treat up to 20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured packet."}], "exploits": [{"lang": "en", "value": "A functional exploit exists."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-1288", "description": "CWE-1288: Improper Validation of Consistency within Input", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-126", "description": "CWE-126 Buffer Over-read", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "shortName": "Tcpdump", "dateUpdated": "2026-09-05T18:51:57.956Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/the-tcpdump-group/libpcap/commit/b9590d482986d64673712460aae1d48d11fa0473"}], "solutions": [{"lang": "en", "value": "Upgrade to libpcap 1.10.7."}], "source": {"discovery": "EXTERNAL"}, "title": "OOBR in rpcap client in libpcap before 1.10.7", "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "modules": ["remote packet capture client"], "product": "libpcap", "programFiles": ["pcap-rpcap.c"], "programRoutines": [{"name": "pcap_read_nocb_remote()"}], "repo": "https://github.com/the-tcpdump-group/libpcap/", "vendor": "The Tcpdump Group", "versions": [{"status": "affected", "version": "1.8.x"}, {"status": "affected", "version": "1.9.x"}, {"lessThan": "1.10.7", "status": "affected", "version": "1.10.x", "versionType": "semver"}]}], "source": "security@tcpdump.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly validates its headers. A malicious server can send a crafted message and cause the client to treat up to 20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured packet."}], "id": "CVE-2026-18238", "lastModified": "2026-09-05T19:16:55.477", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 1.4, "source": "security@tcpdump.org", "type": "Secondary"}]}, "published": "2026-09-05T19:16:55.477", "references": [{"source": "security@tcpdump.org", "url": "https://github.com/the-tcpdump-group/libpcap/commit/b9590d482986d64673712460aae1d48d11fa0473"}], "sourceIdentifier": "security@tcpdump.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-126"}, {"lang": "en", "value": "CWE-1288"}], "source": "security@tcpdump.org", "type": "Secondary"}]}

{}

{"created": "2026-09-05T21:00:05.102054+00:00", "updated": "2026-09-05T21:00:05.102068+00:00", "vendors": []}