samba: fd_open_atomic infinite loop due to wrong handling of dangling symlinks
Published Jun 6, 2017
6.5
MEDIUMCVSS 3.0
EPSS 4.23%
Description
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.
Affected products
No data.
Configuration 1
Configuration 2
- 7.0
- 7.0
- 7.4
- 7.6
- 7.4
- 7.5
- 7.6
- 7.6
- 7.0
Configuration 3
- 8.0
No data.
Red Hat Enterprise Linux 7
samba-0:4.6.2-8.el7
Fixed · RHSA-2017:1950
Red Hat Gluster Storage 3.2 for RHEL 7
samba-0:4.6.3-4.el7rhgs
Fixed · RHSA-2017:2338
Red Hat Gluster Storage 3.3 for RHEL 6
libldb-0:1.1.29-1.el6rhs
Fixed · RHSA-2017:2778
Red Hat Gluster Storage 3.3 for RHEL 6
libtalloc-0:2.1.9-1.el6rhs
Fixed · RHSA-2017:2778
Red Hat Gluster Storage 3.3 for RHEL 6
libtdb-0:1.3.12-1.1.el6rhs
Fixed · RHSA-2017:2778
Red Hat Gluster Storage 3.3 for RHEL 6
libtevent-0:0.9.31-1.el6rhs
Fixed · RHSA-2017:2778
Red Hat Gluster Storage 3.3 for RHEL 6
samba-0:4.6.3-5.el6rhs
Fixed · RHSA-2017:2778
Red Hat Enterprise Linux 5
samba
Not affected
Red Hat Enterprise Linux 5
samba3x
Not affected
Red Hat Enterprise Linux 6
samba
Not affected
Red Hat Enterprise Linux 6
samba4
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | samba-0:4.6.2-8.el7 | Fixed | RHSA-2017:1950 |
| Red Hat Gluster Storage 3.2 for RHEL 7 | samba-0:4.6.3-4.el7rhgs | Fixed | RHSA-2017:2338 |
| Red Hat Gluster Storage 3.3 for RHEL 6 | libldb-0:1.1.29-1.el6rhs | Fixed | RHSA-2017:2778 |
| Red Hat Gluster Storage 3.3 for RHEL 6 | libtalloc-0:2.1.9-1.el6rhs | Fixed | RHSA-2017:2778 |
| Red Hat Gluster Storage 3.3 for RHEL 6 | libtdb-0:1.3.12-1.1.el6rhs | Fixed | RHSA-2017:2778 |
| Red Hat Gluster Storage 3.3 for RHEL 6 | libtevent-0:0.9.31-1.el6rhs | Fixed | RHSA-2017:2778 |
| Red Hat Gluster Storage 3.3 for RHEL 6 | samba-0:4.6.3-5.el6rhs | Fixed | RHSA-2017:2778 |
| Red Hat Enterprise Linux 5 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 5 | samba3x | Not affected | n/a |
| Red Hat Enterprise Linux 6 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 6 | samba4 | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:S/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (22 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.23% (0.04228) | 90.70th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.19% (0.04189) | 89.60th | v5 (v2026.06.15) |
| Nov 21, 2025 | 4.03% (0.04032) | 88.00th | v4 (v2025.03.14) |
| Nov 18, 2025 | 2.29% (0.02294) | 83.37th | v4 (v2025.03.14) |
| Mar 30, 2025 | 4.03% (0.04032) | 87.42th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.40% (0.08404) | 86.94th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.03% (0.04032) | 87.72th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.48% (0.00478) | 76.59th | v3 (v2023.03.01) |
| May 9, 2024 | 0.75% (0.00749) | 80.88th | v3 (v2023.03.01) |
| Mar 27, 2024 | 0.86% (0.00857) | 81.91th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.72% (0.00721) | 78.39th | v3 (v2023.03.01) |
| Oct 22, 2023 | 0.65% (0.00649) | 76.98th | v3 (v2023.03.01) |
| May 8, 2023 | 0.62% (0.00617) | 75.63th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.45% (0.00449) | 71.08th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.10% (0.01104) | 52.45th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.10% (0.01104) | 50.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.10% (0.01104) | 28.85th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.31% (0.02314) | 53.75th | v1 |
| Jan 6, 2022 | 2.31% (0.02314) | 53.29th | v1 |
| Sep 1, 2021 | 2.31% (0.02314) | 78.25th | v1 |
| Apr 14, 2021 | 2.31% (0.02314) | 0.00th | v1 |
References (12)
- http://www.securityfocus.com/bid/99455 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1950 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2338 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2778 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-9461 Vendor Advisory
- https://bugs.debian.org/864291 x_refsource_CONFIRMExploitIssue TrackingPatchThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1459464 Issue Tracking
- https://bugzilla.samba.org/show_bug.cgi?id=12572 x_refsource_CONFIRMExploitIssue TrackingPatchThird Party AdvisoryVDB Entry
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=10c3e3923022485c720f322ca4f0aca5d7501310 x_refsource_CONFIRM
- https://lists.debian.org/debian-lts-announce/2019/04/msg00013.html mailing-listx_refsource_MLISTThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-9461
- https://www.cve.org/CVERecord?id=CVE-2017-9461
Change history (0)
No recorded changes yet.