CVE-2026-18313: medium-severity vulnerability in The Tcpdump Group libpcap
rpcapd memory leak in libpcap before 1.10.7
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.3epss 0.2%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Affected products
The Tcpdump Group · libpcapRelated CVEs — The Tcpdump Group libpcap
In the same product, most dangerous first.
CVE-2026-6554HIGHinfinte loop in libpcap before 1.10.7EPSS 0.4%CVE-2024-8006MEDIUMNULL pointer dereference in libpcap before 1.10.5 with remote packet capture supportEPSS 0.2%CVE-2023-7256MEDIUMDouble-free in libpcap before 1.10.5 with remote packet capture support.EPSS 0.2%CVE-2026-18238MEDIUMOOBR in rpcap client in libpcap before 1.10.7EPSS 0.2%CVE-2026-6244MEDIUMdivision by zero in libpcap before 1.10.7EPSS 0.1%CVE-2025-11964LOWOOBW in utf_16le_to_utf_8_truncated() in libpcapEPSS 0.1%