CVEs / CVE-2017-9445
CVE-2017-9445: n/a n/a vulnerability
- high 7.5 CVSS 3.1 (NVD)
- EPSS 58.8% chance of exploitation in the next 30 days, higher than 99% of CVEs (8 Nov 2026)
- Last changed at its sources
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Description
In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that's too small. A malicious DNS server can exploit this via a response with a specially crafted TCP payload to trick systemd-resolved into allocating a buffer that's too small, and subsequently write arbitrary data beyond the end of it.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a n/a | n/a | — |
Exploitation
Not in the CISA Known Exploited Vulnerabilities catalog as of 6 Nov 2026.
Severity
| CVSS 3.1 | 7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HScored by NVD |
|---|---|
| Weakness | CWE-787 |
References
- CVE-2017-9445 on NVD
- CVE-2017-9445 on OSV
- http://openwall.com/lists/oss-security/2017/06/27/8 Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/99302 Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038806 Third Party Advisory, VDB Entry
- https://launchpad.net/bugs/1695546 Broken Link
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.