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Servers and applications

CVE-2017-9461

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.

Severity
Medium 6.5
Published
6 Jun 2017
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
4.2% in the next 30 daysHigher than 91% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Infinite loop (CWE-835)
Attack
Over the network · Needs a user account · No user action needed
Attacker can
Take it down
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Sources
NVD

Affected software

SoftwareAffected versions
SambaServers and applications · cpe:a:samba:samba
  • Version 4.5.5
  • Version 4.5.4
  • Version 4.5.3
  • Version 4.5.2
All 7 release lines
  • Every version up to 4.4.9
  • Version 4.5.0
  • Version 4.5.1
  • Version 4.5.2
  • Version 4.5.3
  • Version 4.5.4
  • Version 4.5.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-9461
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-9461