CVE-2025-62875 Local DoS in OpenSMTPD via UNIX domain socket smtpd.sock
Local attackers can crash the OpenSMTPD mail server via the UNIX domain socket, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-62875?
CVE-2025-62875 is a medium-severity denial of service vulnerability in openSUSE Tumbleweed, published on 20 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An Improper Check for Unusual or Exceptional Conditions vulnerability in OpenSMTPD allows local users to crash OpenSMTPD.
This issue affects openSUSE Tumbleweed: from ? before 7.8.0p0-1.1.
Weakness: CWE-754
Which versions are affected by CVE-2025-62875?
It affects 2 products.
Linux distribution packages (1)
OpenSMTPD openSUSE:Tumbleweed | All versions | 7.8.0p0-1.1 |
Products include Opensmtpd Opensmtpd, Opensuse Tumbleweed.
How do I fix CVE-2025-62875?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-62875 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-62875 exists.
Sources
Also known as DEBIAN-CVE-2025-62875, GHSA-px28-qwg7-83x2, UBUNTU-CVE-2025-62875, openSUSE-SU-2025:15700-1.