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CVE-2017-9461

26
FAUCET Score

CVE-2017-9461 is a denial-of-service vulnerability affecting Samba versions before 4.4.10 and 4.5.x before 4.5.6, specifically impacting Debian, Red Hat, and Samba products. The vulnerability, rated Medium (CVSS 6.5), stems from an infinite loop in smbd when handling dangling symlinks, leading to high CPU and memory consumption. While no active exploitation, public exploits, or significant community discussion have been observed, the potential impact is a complete denial of service for affected systems.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.4.9CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
4.5.0CPE matchmatch criteria
cpe:2.3:a:samba:samba:4.5.0:*:*:*:*:*:*:*
4.5.1CPE matchmatch criteria
cpe:2.3:a:samba:samba:4.5.1:*:*:*:*:*:*:*
4.5.2CPE matchmatch criteria
cpe:2.3:a:samba:samba:4.5.2:*:*:*:*:*:*:*
4.5.3CPE matchmatch criteria
cpe:2.3:a:samba:samba:4.5.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.19%
Probability of exploitation in next 30 days
EPSS Percentile
89.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0419 is in the 97th percentile among its peer group of 21,924 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: samba-0:4.6.2-8.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.2 for RHEL 7Fixed in: samba-0:4.6.3-4.el7rhgs
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.3 for RHEL 6Fixed in: libldb-0:1.1.29-1.el6rhs
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.3 for RHEL 6Fixed in: libtalloc-0:2.1.9-1.el6rhs
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.3 for RHEL 6Fixed in: libtdb-0:1.3.12-1.1.el6rhs
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.3 for RHEL 6Fixed in: libtevent-0:0.9.31-1.el6rhs
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.3 for RHEL 6Fixed in: samba-0:4.6.3-5.el6rhs
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: samba4

Vendor Advisories (1)

redhatCVE-2017-9461Low

samba: fd_open_atomic infinite loop due to wrong handling of dangling symlinks

Feb 16, 2017

References

access.redhat.com / errata/RHSA-2017:1950
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2338
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2778
Third Party Advisory
bugs.debian.org / 864291
ExploitIssue TrackingPatchThird Party Advisory
bugzilla.samba.org / show_bug.cgi
ExploitIssue TrackingPatchThird Party AdvisoryVDB Entry
git.samba.org
lists.debian.org / debian-lts-announce/2019/04/msg00013.html
Third Party Advisory
securityfocus.com / bid/99455
Third Party AdvisoryVDB Entry