{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18313", "assignerOrgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "state": "PUBLISHED", "assignerShortName": "Tcpdump", "dateReserved": "2026-07-29T17:47:46.571Z", "datePublished": "2026-09-05T18:51:32.438Z", "dateUpdated": "2026-09-08T15:16:52.614Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "modules": ["remote packet capture server"], "product": "libpcap", "programFiles": ["rpcapd/daemon.c"], "programRoutines": [{"name": "daemon_unpackapplyfilter()"}], "repo": "https://github.com/the-tcpdump-group/libpcap/", "vendor": "The Tcpdump Group", "versions": [{"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": "rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use. A malicious client can cause the server to leak memory substantially faster."}], "exploits": [{"lang": "en", "value": "A functional exploit exists."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-401", "description": "CWE-401 Missing Release of Memory after Effective Lifetime", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "shortName": "Tcpdump", "dateUpdated": "2026-09-05T18:51:32.438Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/the-tcpdump-group/libpcap/commit/f9775af1a0ec76db60c7213241e6b48f1be10ac7"}], "solutions": [{"lang": "en", "value": "Upgrade to libpcap 1.10.7."}], "source": {"discovery": "EXTERNAL"}, "title": "rpcapd memory leak in libpcap before 1.10.7", "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-08T15:16:35.323875Z", "id": "CVE-2026-18313", "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": "2026-09-08T15:16:52.614Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-18313", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-08T15:16:35.323875Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-08T15:16:48.581Z"}}], "cna": {"title": "rpcapd memory leak in libpcap before 1.10.7", "source": {"discovery": "EXTERNAL"}, "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://github.com/the-tcpdump-group/libpcap/", "vendor": "The Tcpdump Group", "modules": ["remote packet capture server"], "product": "libpcap", "versions": [{"status": "affected", "version": "1.9.x"}, {"status": "affected", "version": "1.10.x", "lessThan": "1.10.7", "versionType": "semver"}], "programFiles": ["rpcapd/daemon.c"], "defaultStatus": "unaffected", "programRoutines": [{"name": "daemon_unpackapplyfilter()"}]}], "exploits": [{"lang": "en", "value": "A functional exploit exists."}], "solutions": [{"lang": "en", "value": "Upgrade to libpcap 1.10.7."}], "references": [{"url": "https://github.com/the-tcpdump-group/libpcap/commit/f9775af1a0ec76db60c7213241e6b48f1be10ac7", "tags": ["patch"]}], "x_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use. A malicious client can cause the server to leak memory substantially faster."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-401", "description": "CWE-401 Missing Release of Memory after Effective Lifetime"}]}], "configurations": [{"lang": "en", "value": "The problem is specific to the remote packet capture code, which is not enabled in the default build configuration."}], "providerMetadata": {"orgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "shortName": "Tcpdump", "dateUpdated": "2026-09-05T18:51:32.438Z"}}}, "cveMetadata": {"cveId": "CVE-2026-18313", "state": "PUBLISHED", "dateUpdated": "2026-09-08T15:16:52.614Z", "dateReserved": "2026-07-29T17:47:46.571Z", "assignerOrgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "datePublished": "2026-09-05T18:51:32.438Z", "assignerShortName": "Tcpdump"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "modules": ["remote packet capture server"], "product": "libpcap", "programFiles": ["rpcapd/daemon.c"], "programRoutines": [{"name": "daemon_unpackapplyfilter()"}], "repo": "https://github.com/the-tcpdump-group/libpcap/", "vendor": "The Tcpdump Group", "versions": [{"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": "rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use. A malicious client can cause the server to leak memory substantially faster."}], "id": "CVE-2026-18313", "lastModified": "2026-09-08T19:20:25.117", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "security@tcpdump.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-18313", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-08T15:16:35.323875Z", "version": "2.0.3"}}]}, "published": "2026-09-05T19:16:55.590", "references": [{"source": "security@tcpdump.org", "url": "https://github.com/the-tcpdump-group/libpcap/commit/f9775af1a0ec76db60c7213241e6b48f1be10ac7"}], "sourceIdentifier": "security@tcpdump.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "security@tcpdump.org", "type": "Secondary"}]}

{"bugzilla": {"description": "libpcap: libpcap: Denial of Service via memory leak in rpcapd", "id": "2529092", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2529092"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-772", "details": ["rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use. A malicious client can cause the server to leak memory substantially faster.", "A flaw was found in libpcap, specifically within the rpcapd daemon. This vulnerability allows a remote attacker to cause a denial of service (DoS) by sending specially crafted RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ messages. The rpcapd daemon allocates memory for these messages but fails to free it, leading to a memory leak. Over time, this can exhaust available memory, making the service unavailable."], "name": "CVE-2026-18313", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "libpcap", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "libpcap", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "libpcap", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "libpcap", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "libpcap", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-05T18:51:32Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-18313\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-18313\nhttps://github.com/the-tcpdump-group/libpcap/commit/f9775af1a0ec76db60c7213241e6b48f1be10ac7"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "1.9.x"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1.10.x,1.10.7)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "libpcap", "source": "cna", "vendor": "The Tcpdump Group"}, "product": "libpcap", "vendor": "tcpdump"}], "created": "2026-09-05T20:30:17.796631+00:00", "updated": "2026-09-10T04:45:16.130338+00:00", "vendors": ["tcpdump", "tcpdump$PRODUCT$libpcap"]}