CVE-2017-15908

What it is

In systemd 223 through 235, a remote DNS server can respond with a custom crafted DNS NSEC resource record to trigger an infinite loop in the dns_packet_read_type_window() function of the 'systemd-resolved' service and cause a DoS of the affected service.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

23.6% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2017-10-26 14:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:08 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 23.6% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2017-10-26 14:29 UTC

Last modified

2026-06-17 01:08 UTC

Exploit probability

23.6% · EPSS, next 30 days

Weakness

CWE-835

Record status

Modified

Affected

• Systemd Project Systemd 223
• Systemd Project Systemd 224
• Systemd Project Systemd 225
• Systemd Project Systemd 226
• Systemd Project Systemd 227
• Systemd Project Systemd 228
• Systemd Project Systemd 229
• Systemd Project Systemd 230

Attack profile CVSS 3.1 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2017-15908.md and follow it. Check whether this project is affected by CVE-2017-15908. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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