smbd in Samba before 4.4.10 and 4.5.x before 4.5.6 has a denial of service vulnerability (fd_open_atomic infinite loop with high CPU usage and memory consumption) due to wrongly handling dangling symlinks.
CVE-2017-9461
MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence
Score 6.5 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 6.5; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 4%CVSS: 6.5Exploit: NoneExposed: 0
A fix is available — apply it.
- CVSS v3
- 6.5
- EG Score
- 6.5(medium)
- EPSS
- 89.7%
- KEV
- Not listed
Published
June 6, 2017
Last Modified
May 13, 2026
References (16)
- cve@mitrehttp://www.securityfocus.com/bid/99455
- cve@mitrehttps://access.redhat.com/errata/RHSA-2017:1950
- cve@mitrehttps://access.redhat.com/errata/RHSA-2017:2338
- cve@mitrehttps://access.redhat.com/errata/RHSA-2017:2778
- cve@mitrehttps://bugs.debian.org/864291
- cve@mitrehttps://bugzilla.samba.org/show_bug.cgi?id=12572
- cve@mitrehttps://git.samba.org/?p=samba.git%3Ba=commit%3Bh=10c3e3923022485c720f322ca4f0aca5d7501310
- cve@mitrehttps://lists.debian.org/debian-lts-announce/2019/04/msg00013.html
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/99455
- af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:1950
- af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:2338
- af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:2778
- af854a3a-2127-422b-91ae-364da2661108https://bugs.debian.org/864291
- af854a3a-2127-422b-91ae-364da2661108https://bugzilla.samba.org/show_bug.cgi?id=12572
- af854a3a-2127-422b-91ae-364da2661108https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=10c3e3923022485c720f322ca4f0aca5d7501310
Vendor Advisories for CVE-2017-9461(2)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(4)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | samba (2:4.5.8+dfsg-0ubuntu0.17.04.3) @ zesty | 2026-05-22 | ubuntu |
| redhat | samba-0:4.6.3-5.el6rhs | 2017-09-21 | redhat |
| redhat | samba-0:4.6.2-8.el7 | 2017-08-01 | redhat |
| redhat | samba-0:4.6.3-4.el7rhgs | 2017-08-01 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Frequently asked(5)
What is CVE-2017-9461?
CVE-2017-9461 is a medium vulnerability published on June 6, 2017. smbd in Samba before 4.4.10 and 4.5.x before 4.5.6 has a denial of service vulnerability (fdopenatomic infinite loop with high CPU usage and memory consumption) due to wrongly handling dangling symlinks.
When was CVE-2017-9461 disclosed?
CVE-2017-9461 was first published in the National Vulnerability Database on June 6, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-9461 actively exploited?
CVE-2017-9461 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 89.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-9461?
CVE-2017-9461 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2017-9461?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-9461, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2017-9461
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