CVE-2026-18313

{"id": "CVE-2026-18313", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-18313", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-08T15:16:35.323875Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@tcpdump.org", "cvssData": {"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"}, "impactScore": 1.4, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security@tcpdump.org", "affectedData": [{"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()"}]}]}], "published": "2026-09-05T19:16:55.590", "references": [{"url": "https://github.com/the-tcpdump-group/libpcap/commit/f9775af1a0ec76db60c7213241e6b48f1be10ac7", "source": "security@tcpdump.org"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "security@tcpdump.org", "description": [{"lang": "en", "value": "CWE-401"}]}], "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."}], "lastModified": "2026-09-08T19:20:25.117", "sourceIdentifier": "security@tcpdump.org"}