{"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":"2026-09-08T15:17:19.641Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-08T15:17:08.655802Z","id":"CVE-2026-18238","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-08T15:17:19.641Z"}}]}}