CVE-2026-18238: OOBR in rpcap client in libpcap before 1.10.7
The Tcpdump Group · libpcap
Vendor fix available · Affected: The Tcpdump Group libpcap · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 7% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- The Tcpdump Group · libpcap1.8.x; 1.9.x; from 1.10.x before 1.10.7
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- The Tcpdump Group
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-18238 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.