HIGH
tcpdump: Resource exhaustion in smb_fdata() funtion in smbutil.c
Published Oct 3, 2019
7.5
HIGHCVSS 3.1
EPSS 4.12%
Description
The SMB parser in tcpdump before 4.9.3 has stack exhaustion in smbutil.c:smb_fdata() via recursion.
Affected products
No data.
No data.
Red Hat Enterprise Linux 8
tcpdump-14:4.9.3-1.el8
Fixed · RHSA-2020:4760
Red Hat Enterprise Linux 5
tcpdump
Out of support scope
Red Hat Enterprise Linux 6
tcpdump
Out of support scope
Red Hat Enterprise Linux 7
tcpdump
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | tcpdump-14:4.9.3-1.el8 | Fixed | RHSA-2020:4760 |
| Red Hat Enterprise Linux 5 | tcpdump | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | tcpdump | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | tcpdump | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
7.5 HIGH NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Dec 3, 2025 · SSVC 2.0.3
4.12% 0.04122
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.04122
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 4.12% (0.04122) | 90.49th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.12% (0.04122) | 89.45th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.23% (0.01235) | 77.36th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.86% (0.03860) | 80.07th | v4 (v2025.03.14) |
| Mar 28, 2025 | 1.23% (0.01235) | 77.36th | v4 (v2025.03.14) |
| Mar 27, 2025 | 3.86% (0.03860) | 86.69th | v4 (v2025.03.14) |
| Mar 20, 2025 | 1.27% (0.01269) | 77.73th | v4 (v2025.03.14) |
| Mar 19, 2025 | 3.96% (0.03963) | 87.00th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.27% (0.01269) | 78.11th | v4 (v2025.03.14) |
| Dec 17, 2024 | 1.00% (0.00996) | 83.38th | v3 (v2023.03.01) |
| Nov 9, 2024 | 2.71% (0.02705) | 90.77th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.78% (0.00785) | 80.86th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.78% (0.00785) | 78.69th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.48% (0.03480) | 68.33th | v5 (v2026.06.15) |
| Apr 14, 2021 | 3.48% (0.03480) | 0.00th | v1 |
Weaknesses (2)
References (20)
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00050.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00053.html vendor-advisoryx_refsource_SUSE
- http://seclists.org/fulldisclosure/2019/Dec/26 mailing-listx_refsource_FULLDISC
- https://access.redhat.com/security/cve/CVE-2018-16452 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1760518 Issue Tracking
- https://github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGES x_refsource_MISCRelease NotesThird Party Advisory
- https://github.com/the-tcpdump-group/tcpdump/commit/24182d959f661327525a20d9a94c98a8ec016778 x_refsource_CONFIRMPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00015.html mailing-listx_refsource_MLIST
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62XY42U6HY3H2APR5EHNWCZ7SAQNMMJN/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNYXF3IY2X65IOD422SA6EQUULSGW7FN/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R2UDPOSGVJQIYC33SQBXMDXHH4QDSDMU/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2018-16452
- https://seclists.org/bugtraq/2019/Dec/23 mailing-listx_refsource_BUGTRAQ
- https://seclists.org/bugtraq/2019/Oct/28 mailing-listx_refsource_BUGTRAQ
- https://security.netapp.com/advisory/ntap-20200120-0001/ x_refsource_CONFIRM
- https://support.apple.com/kb/HT210788 x_refsource_CONFIRM
- https://usn.ubuntu.com/4252-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4252-2/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2018-16452
- https://www.debian.org/security/2019/dsa-4547 vendor-advisoryx_refsource_DEBIAN
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Oct 3, 2019
Updated Dec 3, 2025
Reserved Sep 3, 2018
Link CVE-2018-16452
CISA Vulnrichment
Updated Dec 3, 2025