CVE-2026-18238CWE-126CWE-1288

CVE-2026-18238

Medium · published September 5, 2026

CVSS v3.1
5.0
EPSS
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.0 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
Not scored
Weaknesses
CWE-126 · Buffer Over-read; CWE-1288 · Improper Validation of Consistency within Input
Published
2026-09-05T23:16Z
References (1)
Timeline
  • 05 SEP 18:51Z
    OOBR in rpcap client in libpcap before 1.10.7
    cvelistv5