CVE-2023-6174

Out-of-bounds Read in Wireshark

6.3 MediumFix available

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or crafted capture file

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: Low

Exploit likelihood

0.75%Up 0.7 points since Nov 17, 2023

What each source reports

CVE List Score used 6.3

Out-of-bounds Read in Wireshark

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or crafted capture file

Record: CVE-2023-6174
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Weakness: CWE-125
Updated: 2026-11-02

EUVDEUVD-2023-58424 6.3

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or crafted capture file

Record: EUVD-2023-58424
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-xx79-4755-jq22 6.3

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or...

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or crafted capture file

Record: GHSA-xx79-4755-jq22
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Weakness: CWE-74, CWE-125
Updated: 2026-11-02

NVD 6.3

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or crafted capture file

Record: CVE-2023-6174
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-125, CWE-74
Updated: 2026-11-02

OSVALPINE-CVE-2023-6174 6.5

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or crafted capture file

Record: ALPINE-CVE-2023-6174
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-03

OSVAZL-32030 6.5

CVE-2023-6174 affecting package wireshark 4.0.8-1

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or crafted capture file

Record: AZL-32030
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

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OSVAZL-37057 6.5

CVE-2023-6174 affecting package wireshark for versions less than 4.4.7-1

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or crafted capture file

Record: AZL-37057
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSV 6.3

Out-of-bounds Read in Wireshark

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or crafted capture file

Record: CVE-2023-6174
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Weakness: CWE-125
Updated: 2026-11-02

OSVDEBIAN-CVE-2023-6174 6.5

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or crafted capture file

Record: DEBIAN-CVE-2023-6174
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-6174 6.3

SSH dissector crash in Wireshark 4.0.0 to 4.0.10 allows denial of service via packet injection or crafted capture file

Record: UBUNTU-CVE-2023-6174
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVMGASA-2024-0045 No score

Updated wireshark packages fix security vulnerabilities

The updated packages fix security vulnerabilities: RTPS dissector memory leak. (CVE-2023-5371) SSH dissector invalid read of memory blocks. (CVE-2023-6174) NetScreen File Parsing Heap-based Buffer Overflow. (CVE-2023-6175) GVCP dissector crash via packet injection or crafted capture file. (CVE-2024-0208)

Record: MGASA-2024-0045
Updated: 2026-11-02

OSVopenSUSE-SU-2024:13458-1 No score

libwireshark16-4.0.11-2.1 on GA media

These are all security issues fixed in the libwireshark16-4.0.11-2.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:13458-1
Updated: 2026-11-02

OSVSUSE-SU-2024:3165-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

wireshark was updated from version 3.6.23 to version 4.2.6 (jsc#PED-8517):

Security issues fixed with this update:
- CVE-2024-0207: HTTP3 dissector crash (bsc#1218503)
- CVE-2024-0210: Zigbee TLV dissector crash (bsc#1218506)
- CVE-2024-0211: DOCSIS dissector crash (bsc#1218507)
- CVE-2023-6174: Fixed SSH dissector crash (bsc#1217247)
- CVE-2023-6175: NetScreen file parser crash (bsc#1217272)
- CVE-2023-5371: RTPS dissector memory leak (bsc#1215959)
- CVE-2023-3649: iSCSI dissector crash (bsc#1213318)
- CVE-2023-2854: BLF file parser crash (bsc#1211708)
- CVE-2023-0666: RTPS dissector crash (bsc#1211709)
- CVE-2023-0414: EAP dissector crash (bsc#1207666)
Major changes introduced with versions 4.2.0 and 4.0.0:
- Version 4.2.0 https://www.wireshark.org/docs/relnotes/wireshark-4.2.0.html
- Version 4.0.0 https://www.wireshark.org/docs/relnotes/wireshark-4.0.0.html
Added an aditional desktopfile to start wireshark which asks for the super user password.

Record: SUSE-SU-2024:3165-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`wireshark` Alpine:v3.18	4.0.0 up to 4.0.11-r0	4.0.11-r0
`wireshark` Alpine:v3.19	4.0.0 up to 4.0.11-r0	4.0.11-r0
`wireshark` Alpine:v3.20	4.0.0 up to 4.0.11-r0	4.0.11-r0
`wireshark` Alpine:v3.21	4.0.0 up to 4.0.11-r0	4.0.11-r0
`wireshark` Alpine:v3.22	4.0.0 up to 4.0.11-r0	4.0.11-r0
`wireshark` Alpine:v3.23	4.0.0 up to 4.0.11-r0	4.0.11-r0
`wireshark` Alpine:v3.24	4.0.0 up to 4.0.11-r0	4.0.11-r0
`wireshark` Azure Linux:2	through 4.0.8-1	None known
`wireshark` Azure Linux:3	before 4.4.7-1	4.4.7-1
`wireshark` Debian:12	before 4.0.11-1~deb12u1, plus listed versions 4.0.10-14.0.3-14.0.5-1~exp14.0.6-14.0.6-1~deb12u14.0.6-1~exp14.0.7-14.0.8-1	4.0.11-1~deb12u1

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Affected packages
Package	Affected	Fixed
`wireshark` Debian:13	before 4.0.11-1	4.0.11-1
`wireshark` Debian:14	before 4.0.11-1	4.0.11-1
`wireshark` Debian:12 From an advisory covering 9 CVEs	before 4.0.11-1~deb12u1, plus listed versions 4.0.10-14.0.3-14.0.5-1~exp14.0.6-14.0.6-1~deb12u14.0.6-1~exp14.0.7-14.0.8-1	4.0.11-1~deb12u1
`wireshark` Mageia:9 From an advisory covering 4 CVEs	before 4.0.12-1.mga9	4.0.12-1.mga9
`wireshark` SUSE:Linux Enterprise Module for Basesystem 15 SP6 From an advisory covering 11 CVEs	before 4.2.6-150600.18.6.1	4.2.6-150600.18.6.1
`wireshark` SUSE:Linux Enterprise Module for Desktop Applications 15 SP6 From an advisory covering 11 CVEs	before 4.2.6-150600.18.6.1	4.2.6-150600.18.6.1
`wireshark` openSUSE:Leap 15.6 From an advisory covering 11 CVEs	before 4.2.6-150600.18.6.1	4.2.6-150600.18.6.1
`wireshark` openSUSE:Tumbleweed From an advisory covering 2 CVEs	before 4.0.11-2.1	4.0.11-2.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	affected, aliases, references	OSV
Nov 3, 2026	affected
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-6174 is a medium vulnerability (CVSS 6.3) in Wireshark, published November 16, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.75%, the 55th percentile. Fixed in wireshark 4.0.11-r0.

References

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