CVE-2026-18313

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{"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"}

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