CVE-2017-9445: systemd_project systemd Out-of-bounds Write
Vulnerability summary
CVE-2017-9445 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in systemd_project systemd. EPSS estimates a 54.84% chance of exploitation in the next 30 days, higher than 99% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 55% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 28-06-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
54.84%
Chance of exploitation in the next 30 days
Percentile
99%
Versus all other CVEs
30-day change
No change 0.00 pp
From 54.84% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Suse9 products
- dracut&distro=SUSE Linux Enterprise Desktop 12 SP2< 044.1-109.8.3
- dracut&distro=SUSE Linux Enterprise Server 12 SP2< 044.1-109.8.3
- dracut&distro=SUSE Linux Enterprise Server for Raspberry Pi 12 SP2< 044.1-109.8.3
- dracut&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP2< 044.1-109.8.3
- systemd&distro=SUSE Linux Enterprise Desktop 12 SP2< 228-150.7.1
Debian1 product
- systemd< 233-10
Systemd_project1 product
- systemd≥ 223, ≤ 233
Ubuntu1 product
- systemd< 229-4ubuntu19
4 vendors · 12 products
References
19 links- openwall.com/lists/oss-security/2017/06/27/8X Refsource CONFIRMMailing ListPatchThird Party Advisory
Show all 19 references
- bugzilla.suse.com/986216REPORT
