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CVE-2021-4190

Large loop in the Kafka dissector in Wireshark 3.6.0 allows denial of service via packet...

7.5 HighFix available

Large loop in the Kafka dissector in Wireshark 3.6.0 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
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

3.33%Up 2.3 points since Dec 31, 2021
90%50%10%1%

What each source reports

CVE List Score used 7.5

Large loop in the Kafka dissector in Wireshark 3.6.0 allows denial of service via packet injection or crafted capture file

Record
CVE-2021-4190
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
EUVDEUVD-2021-34050 7.5

Large loop in the Kafka dissector in Wireshark 3.6.0 allows denial of service via packet injection or crafted capture file

Record
EUVD-2021-34050
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-pmc4-9968-jrp7 7.5

Large loop in the Kafka dissector in Wireshark 3.6.0 allows denial of service via packet...

Large loop in the Kafka dissector in Wireshark 3.6.0 allows denial of service via packet injection or crafted capture file

Record
GHSA-pmc4-9968-jrp7
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-772, CWE-834
Updated
2026-11-02
NVD 7.5

Large loop in the Kafka dissector in Wireshark 3.6.0 allows denial of service via packet injection or crafted capture file

Record
CVE-2021-4190
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-834
Updated
2026-11-02
OSVAZL-9100 7.5

CVE-2021-4190 affecting package wireshark for versions less than 3.4.14-1

Large loop in the Kafka dissector in Wireshark 3.6.0 allows denial of service via packet injection or crafted capture file

Record
AZL-9100
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 7.5

Large loop in the Kafka dissector in Wireshark 3.6.0 allows denial of service via packet injection or crafted capture file

Record
CVE-2021-4190
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 7 moreShow less
OSVDEBIAN-CVE-2021-4190 7.5

Large loop in the Kafka dissector in Wireshark 3.6.0 allows denial of service via packet injection or crafted capture file

Record
DEBIAN-CVE-2021-4190
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2021-4190 7.5

Large loop in the Kafka dissector in Wireshark 3.6.0 allows denial of service via packet injection or crafted capture file

Record
UBUNTU-CVE-2021-4190
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVCLSA-2026-1777370059 No score

wireshark: Fix of 7 CVEs

  • CVE-2021-4181: sysdig event dissector SIGSEGV fix
  • CVE-2021-4182: rfc7468 file parser infinite loop fix
  • CVE-2021-4184: bt-dht endless loop fix
  • CVE-2021-4186: gryphon NULL pkt_info dereference fix
  • CVE-2021-4190: kafka dissector varint strictness fix
  • CVE-2022-0581: cms dissector globals-scoping fix
  • CVE-2022-0583: pvfs2 heap overflow OOB read fix
Record
CLSA-2026-1777370059
Updated
2026-11-02
OSVMGASA-2022-0068 No score

Updated wireshark packages fix security vulnerability

Kafka dissector infinite loop (CVE-2021-4190).

RTMPT dissector infinite loop (wnpa-sec-2022-01).

Large loops in multiple dissectors (wnpa-sec-2022-02).

PVFS dissector crash (wnpa-sec-2022-03).

CSN.1 dissector crash (wnpa-sec-2022-04).

CMS dissector crash (wnpa-sec-2022-05).

Record
MGASA-2022-0068
Updated
2026-11-02
OSVopenSUSE-SU-2022:0375-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

Update to version 3.6.1:

  • CVE-2021-4185: RTMPT dissector infinite loop (bsc#1194166)
  • CVE-2021-4184: BitTorrent DHT dissector infinite loop (bsc#1194167)
  • CVE-2021-4183: pcapng file parser crash (bsc#1194168)
  • CVE-2021-4182: RFC 7468 file parser infinite loop (bsc#1194169)
  • CVE-2021-4181: Sysdig Event dissector crash (bsc#1194170)
  • CVE-2021-4190: Kafka dissector infinite loop (bsc#1194171)
  • Support for Shared Memory Communications (SMC) (jsc#SLE-18727)
Record
openSUSE-SU-2022:0375-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:11707-1 No score

libwireshark15-3.6.1-2.1 on GA media

These are all security issues fixed in the libwireshark15-3.6.1-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11707-1
Updated
2026-11-02
OSVSUSE-SU-2022:0375-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

Update to version 3.6.1:

  • CVE-2021-4185: RTMPT dissector infinite loop (bsc#1194166)
  • CVE-2021-4184: BitTorrent DHT dissector infinite loop (bsc#1194167)
  • CVE-2021-4183: pcapng file parser crash (bsc#1194168)
  • CVE-2021-4182: RFC 7468 file parser infinite loop (bsc#1194169)
  • CVE-2021-4181: Sysdig Event dissector crash (bsc#1194170)
  • CVE-2021-4190: Kafka dissector infinite loop (bsc#1194171)
  • Support for Shared Memory Communications (SMC) (jsc#SLE-18727)
Record
SUSE-SU-2022:0375-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
wireshark
Azure Linux:2
 before 3.4.14-1
3.4.14-1
wireshark
TuxCare:AlmaLinux:9.2
From an advisory covering 7 CVEs
 before 1:3.4.10-4.el9.tuxcare.els7
1:3.4.10-4.el9.tuxcare.els7
wireshark-cli
TuxCare:AlmaLinux:9.2
From an advisory covering 7 CVEs
 before 1:3.4.10-4.el9.tuxcare.els7
1:3.4.10-4.el9.tuxcare.els7
wireshark-devel
TuxCare:AlmaLinux:9.2
From an advisory covering 7 CVEs
 before 1:3.4.10-4.el9.tuxcare.els7
1:3.4.10-4.el9.tuxcare.els7
wireshark
Debian:12
 before 3.6.2-1
3.6.2-1
wireshark
Debian:13
 before 3.6.2-1
3.6.2-1
wireshark
Debian:14
 before 3.6.2-1
3.6.2-1
wireshark
Debian:11
From an advisory covering 47 CVEs
 before 3.4.16-0+deb11u1, plus listed versions
3.4.10-0+deb11u13.4.4-13.4.6-1~exp13.4.7-13.4.7-1~exp13.4.8-13.4.9-1
3.4.16-0+deb11u1
wireshark
Mageia:8
 before 3.4.12-1.mga8
3.4.12-1.mga8
libvirt
SUSE:Linux Enterprise Module for Basesystem 15 SP3
From an advisory covering 6 CVEs
 before 7.1.0-150300.6.23.1
7.1.0-150300.6.23.1
Show 26 moreShow less
Affected packages
PackageAffectedFixed
wireshark
SUSE:Linux Enterprise Module for Basesystem 15 SP3
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise Module for Desktop Applications 15 SP3
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
libvirt
SUSE:Linux Enterprise Module for Server Applications 15 SP3
From an advisory covering 6 CVEs
 before 7.1.0-150300.6.23.1
7.1.0-150300.6.23.1
wireshark
SUSE:Linux Enterprise High Performance Computing 15-ESPOS
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise High Performance Computing 15-LTSS
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise Server 15-LTSS
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise Server 15 SP1-BCL
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise Server 15 SP1-LTSS
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise Server 15 SP2-BCL
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise Server 15 SP2-LTSS
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise Server for SAP Applications 15
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise Server for SAP Applications 15 SP1
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Linux Enterprise Server for SAP Applications 15 SP2
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Manager Proxy 4.1
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Manager Retail Branch Server 4.1
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Manager Server 4.1
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
libvirt
SUSE:Linux Enterprise Micro 5.1
From an advisory covering 6 CVEs
 before 7.1.0-150300.6.23.1
7.1.0-150300.6.23.1
wireshark
SUSE:Enterprise Storage 6
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
SUSE:Enterprise Storage 7
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
libvirt
openSUSE:Leap 15.3
From an advisory covering 6 CVEs
 before 7.1.0-150300.6.23.1
7.1.0-150300.6.23.1
wireshark
openSUSE:Leap 15.3
From an advisory covering 6 CVEs
 before 3.6.1-3.68.1
3.6.1-3.68.1
wireshark
openSUSE:Tumbleweed
 before 3.6.1-2.1
3.6.1-2.1

History

History
RecordedChangedSources
affected, facts
affected
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2021-4190 is a high vulnerability (CVSS 7.5) in Wireshark, published December 30, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.33%, the 88th percentile. Fixed in wireshark 3.4.14-1.

References

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