Main Vulnerability Database Vulnerabilities #VU117884

Input validation error in OpenSMTPD - CVE-2025-62875

Published: November 1, 2025

Vulnerability identifier: #VU117884

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-62875

CWE-ID: CWE-20

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when handling imsg messages. A local user can send a specially crafted imsg message to the local socket and crash the daemon.

Affected software

OpenSMTPD
OpenBSD

How to mitigate CVE-2025-62875

Install updates from vendor's website.

OpenSMTPD - update to 7.8.0p0

External References

https://github.com/OpenSMTPD/OpenSMTPD/releases/tag/7.8.0p0

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