{"id":"CVE-2026-18313","summary":"rpcapd memory leak in libpcap before 1.10.7","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.","modified":"2026-09-11T18:26:41.507001356Z","published":"2026-09-05T18:51:32.438Z","related":["openSUSE-SU-2026:11744-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18313.json","cna_assigner":"Tcpdump","cwe_ids":["CWE-401"]},"references":[{"type":"WEB","url":"https://github.com/the-tcpdump-group/libpcap/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18313.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18313"},{"type":"FIX","url":"https://github.com/the-tcpdump-group/libpcap/commit/f9775af1a0ec76db60c7213241e6b48f1be10ac7"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/the-tcpdump-group/libpcap","events":[{"introduced":"8c6c412779eb5bc57c9d07fe5a25f8046088bef5"},{"introduced":"82001f32ed9e76b0515a19ee0cc5be28c8ee0541"},{"fixed":"f9775af1a0ec76db60c7213241e6b48f1be10ac7"}],"database_specific":{"extracted_events":[{"introduced":"1.10.x"},{"fixed":"1.10.7"},{"introduced":"1.9.x"},{"last_affected":"1.9.x"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["1.9.x","libpcap-1.10.6","libpcap-1.10.5","libpcap-1.10.4","libpcap-1.10.3","libpcap-1.10.2","libpcap-1.10.1","libpcap-1.10.0","libpcap-1.10-bp"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18313.json","vanir_signatures_modified":"2026-09-11T14:15:11Z","vanir_signatures":[{"signature_version":"v1","source":"https://github.com/the-tcpdump-group/libpcap/commit/f9775af1a0ec76db60c7213241e6b48f1be10ac7","target":{"file":"rpcapd/daemon.c"},"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["277286431125731113753577220540607800933","310287301396215292472603327614505895066","13308025512888773093676422163443226306","53655009404094493863216046712586535193","25110073367291118553042984480090902737","124614544356523393757357363679496182354","20120128971763781583312504216590202487","158524013488243767937161439115032544009","97510527504415412974213691961063243908","276626020291007073509684460307892736766","322659395838062879773091477871152181372","126010167104050920460092375951709965469","46498358299002725646686203280236746990","304157104837686640736395304063586672827","49910197953755647576489570782038815630","273074336872437356646355748260309628962","72392989514099484162167688742882252601","53527072917656164329110130841299810004","33088874624062974902551018792986486762","13255044863552552841072397589797951654","40871188566960555797534865343993917120","67351878776155574680218283111024918721"]},"id":"CVE-2026-18313-a2f595d4","signature_type":"Line"},{"deprecated":false,"digest":{"function_hash":"276061219323428994871975247569544909862","length":1592},"id":"CVE-2026-18313-fe78373f","signature_type":"Function","signature_version":"v1","source":"https://github.com/the-tcpdump-group/libpcap/commit/f9775af1a0ec76db60c7213241e6b48f1be10ac7","target":{"function":"daemon_unpackapplyfilter","file":"rpcapd/daemon.c"}}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"}]}