How severe is CVE-2017-15908?

CVE-2017-15908 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-15908 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 24% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-15908?

CVE-2017-15908 primarily affects Systemd Project Systemd. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-15908?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-15908 published?

CVE-2017-15908 was published on 2017-10-26 and last updated on 2026-06-17.

CVE-2017-15908

CVE-2017-15908 is a high-severity vulnerability in Systemd Project Systemd with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 24% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-835.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 24% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-835
Affected product: Systemd Project Systemd
Published: 2017-10-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2017-15908?: 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.
How severe is CVE-2017-15908?: CVE-2017-15908 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-15908 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 24% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-15908?: CVE-2017-15908 primarily affects Systemd Project Systemd. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-15908?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-15908 published?: CVE-2017-15908 was published on 2017-10-26 and last updated on 2026-06-17.

References

Affected products (15)

cpe:2.3:a:systemd_project:systemd:223:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:224:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:225:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:226:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:227:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:228:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:229:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:230:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:231:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:232:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:233:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:234:*:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:235:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*

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