Description
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.
Published: 2026-09-05
Score: 5 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Upgrade to libpcap 1.10.7.

Tracking

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Advisories

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History

Sat, 05 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
Description 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.
Title OOBR in rpcap client in libpcap before 1.10.7
Weaknesses CWE-126
CWE-1288
References
Metrics cvssV3_1

{'score': 5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: Tcpdump

Published:

Updated: 2026-09-05T18:51:57.956Z

Reserved: 2026-07-29T13:32:44.322Z

Link: CVE-2026-18238

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-05T19:16:55.477

Modified: 2026-09-05T19:16:55.477

Link: CVE-2026-18238

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-05T21:00:05Z

Weaknesses