VDB
CVE-2026-18238
CVE-2026-18238
PUBLISHED
CVSS 5 MEDIUM
Reported by Tcpdump · Published September 5, 2026
The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly validates its headers. A malicious server can send a crafted message and cause the client to treat up to 20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured packet.
Risk Scores
CVSS 3.1
5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| The Tcpdump Group | libpcap | 1.8.x, 1.9.x, 1.10.x |
| The Tcpdump Group | libpcap | 1.10.x, 1.8.x, 1.9.x |
| The Tcpdump Group | libpcap |
Timeline
- Sep 5, 2026 Coalition ESS Score
- Sep 5, 2026 CVE Published
- Sep 6, 2026 EPSS Score
- Sep 8, 2026 CVE Updated
- Sep 15, 2026 EPSS Score