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CVE-2025-13946

Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark

5.5 MediumFix available

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.16%Up 0.1 points since Dec 3, 2025
90%50%10%1%

What each source reports

CVE List Score used 5.5

Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service

Record
CVE-2025-13946
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
EUVDEUVD-2025-200732 5.5

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service

Record
EUVD-2025-200732
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-5gwr-vqfx-wj2m 5.5

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of...

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service

Record
GHSA-5gwr-vqfx-wj2m
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
NVD 5.5

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service

Record
CVE-2025-13946
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
OSV 5.5

Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service

Record
CVE-2025-13946
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
OSVDEBIAN-CVE-2025-13946 5.5

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service

Record
DEBIAN-CVE-2025-13946
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 16 moreShow less
OSVOESA-2026-1058 5.5

wireshark security update

Security Fix(es):

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service(CVE-2025-13946)

Record
OESA-2026-1058
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVOESA-2026-1059 5.5

wireshark security update

Security Fix(es):

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service(CVE-2025-13946)

Record
OESA-2026-1059
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVOESA-2026-1060 5.5

wireshark security update

Security Fix(es):

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service(CVE-2025-13946)

Record
OESA-2026-1060
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVOESA-2026-1061 5.5

wireshark security update

Security Fix(es):

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service(CVE-2025-13946)

Record
OESA-2026-1061
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVOESA-2026-1062 5.5

wireshark security update

Security Fix(es):

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service(CVE-2025-13946)

Record
OESA-2026-1062
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVOESA-2026-1546 7.8

wireshark security update

Wireshark is an open source tool for profiling network traffic and analyzing packets. Such a tool is often referred to as a network analyzer, network protocol analyzer or sniffer.

Security Fix(es):

MONGO dissector infinite loop in Wireshark 4.4.0 to 4.4.9 and 4.2.0 to 4.2.13 allows denial of service(CVE-2025-11626)

Kafka dissector crash in Wireshark 4.6.0 and 4.4.0 to 4.4.10 allows denial of service due to access of uninitialized pointer(CVE-2025-13499)

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service(CVE-2025-13946)

Column handling crashes in Wireshark 4.4.0 to 4.4.6 and 4.2.0 to 4.2.12 allows denial of service via packet injection or crafted capture file(CVE-2025-5601)

Record
OESA-2026-1546
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2025-13946 5.5

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service

Record
UBUNTU-CVE-2025-13946
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVAZL-71213 No score

CVE-2025-13946 affecting package wireshark 4.4.7-2

MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service

Record
AZL-71213
Updated
2026-11-05
OSVMGASA-2026-0184 No score

Updated wireshark packages fix security vulnerabilities

Multiple vulnerabilities have been discovered in Wireshark, a network protocol analyzer, which could result in denial of service or the execution of arbitrary code. This update fixes the reported issue.

Record
MGASA-2026-0184
Updated
2026-11-02
OSVopenSUSE-SU-2025:15799-1 No score

libwireshark19-4.6.2-1.1 on GA media

These are all security issues fixed in the libwireshark19-4.6.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2025:15799-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:20151-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

Update to Wireshark 4.4.13:

  • CVE-2025-11626: MONGO dissector infinite loop (bsc#1251933).
  • CVE-2025-13499: Kafka dissector crash (bsc#1254108).
  • CVE-2025-13945: HTTP3 dissector crash (bsc#1254471).
  • CVE-2025-13946: MEGACO dissector infinite loop (bsc#1254472).
  • CVE-2025-9817: SSH dissector crash (bsc#1249090).
  • CVE-2026-0959: IEEE 802.11 dissector crash (bsc#1256734).
  • CVE-2026-0961: BLF file parser crash (bsc#1256738).
  • CVE-2026-0962: SOME/IP-SD dissector crash (bsc#1256739).

Full changelog:

https://www.wireshark.org/docs/relnotes/wireshark-4.4.13.html

Record
openSUSE-SU-2026:20151-1
Updated
2026-11-02
OSVSUSE-SU-2025:4413-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

  • CVE-2025-13499: Fixed Kafka dissector crash due to a malformed packet (bsc#1254108).
  • CVE-2025-13946: Fixed MEGACO dissector infinite loop that allows a denial of service (bsc#1254472).
Record
SUSE-SU-2025:4413-1
Updated
2026-11-02
OSVSUSE-SU-2025:4440-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

  • CVE-2025-13499: Fixed Kafka dissector crash due to malformed packet (bsc#1254108).
  • CVE-2025-13946: Fixed MEGACO dissector infinite loop that allows denial of service (bsc#1254472).
Record
SUSE-SU-2025:4440-1
Updated
2026-11-02
OSVSUSE-SU-2026:0817-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

  • CVE-2025-13946: MEGACO dissector infinite loop (bsc#1254472).
Record
SUSE-SU-2026:0817-1
Updated
2026-11-02
OSVSUSE-SU-2026:1169-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

Update Wireshark to version 4.6.4 (jsc#PED-15400).

  • CVE-2024-9780: ITS dissector crash (bsc#1231475).
  • CVE-2024-9781: AppleTalk and RELOAD Framing dissector crash (bsc#1231476).
  • CVE-2024-11595: Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark (bsc#1233594).
  • CVE-2024-11596: Buffer Over-read in Wireshark (bsc#1233593).
  • CVE-2025-1492: Uncontrolled Recursion in Wireshark (bsc#1237414).
  • CVE-2025-5601: Column handling crashes in Wireshark allows denial of service (bsc#1244081).
  • CVE-2025-9817: NULL Pointer Dereference in ssh dissector (bsc#1249090).
  • CVE-2025-13499: a malformed packet can lead to a Kafka dissector crash (bsc#1254108).
  • CVE-2025-13674: injecting a malformed packet can cause a crash (bsc#1254262).
  • CVE-2025-13945: HTTP3 dissector crash in Wireshark 4.6.0 and 4.6.1 allows denial of service (bsc#1254471).
  • CVE-2025-13946: MEGACO dissector infinite loop in Wireshark 4.6.0 to 4.6.1 and 4.4.0 to 4.4.11 allows denial of service (bsc#1254472).
  • CVE-2026-0959: denial of service via IEEE 802.11 protocol dissector crash (bsc#1256734).
  • CVE-2026-0960: denial of Service via HTTP3 protocol dissector infinite loop (bsc#1256736).
  • CVE-2026-0961: denial of Service vulnerability in BLF file parser (bsc#1256738).
  • CVE-2026-0962: denial of Service via SOME/IP-SD protocol dissector crash (bsc#1256739).
  • CVE-2026-3201: missing limit checks in USB HID protocol dissector's parse_report_descriptor function can lead to memory exhaustion (bsc#1258907).
  • CVE-2026-3202: missing checks in NTS-KE protocol dissector can lead to crash (bsc#1258908).
  • CVE-2026-3203: missing length checks in the RF4CE Profile protocol dissector can lead to illegal memory access and crash (bsc#1258909).

Also libvirt was rebuilt against wireshark for the libvirt plugin.

Record
SUSE-SU-2026:1169-1
Updated
2026-11-02
OSVSUSE-SU-2026:20222-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

Update to Wireshark 4.4.13:

  • CVE-2025-11626: MONGO dissector infinite loop (bsc#1251933).
  • CVE-2025-13499: Kafka dissector crash (bsc#1254108).
  • CVE-2025-13945: HTTP3 dissector crash (bsc#1254471).
  • CVE-2025-13946: MEGACO dissector infinite loop (bsc#1254472).
  • CVE-2025-9817: SSH dissector crash (bsc#1249090).
  • CVE-2026-0959: IEEE 802.11 dissector crash (bsc#1256734).
  • CVE-2026-0961: BLF file parser crash (bsc#1256738).
  • CVE-2026-0962: SOME/IP-SD dissector crash (bsc#1256739).

Full changelog:

https://www.wireshark.org/docs/relnotes/wireshark-4.4.13.html

Record
SUSE-SU-2026:20222-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
wireshark
Azure Linux:3
 through 4.4.7-2 None known
wireshark
Debian:12
 before 4.0.17-0+deb12u2, plus listed versions
4.0.10-14.0.11-14.0.11-1~deb12u14.0.17-0+deb12u14.0.3-1
Show 6 moreShow less
4.0.5-1~exp14.0.6-14.0.6-1~deb12u14.0.6-1~exp14.0.7-14.0.8-1
4.0.17-0+deb12u2
wireshark
Debian:13
 before 4.4.13-0+deb13u1, plus listed versions
4.4.7-14.4.8-0exp14.4.9-1
4.4.13-0+deb13u1
wireshark
Debian:14
 before 4.6.2-1, plus listed versions
4.4.7-14.4.8-0exp14.4.9-14.6.0-0exp14.6.0-1
Show 4 moreShow less
4.6.0~rc1-0exp14.6.0~rc1-0exp24.6.1-14.6.1-2
4.6.2-1
wireshark
Debian:11
From an advisory covering 8 CVEs
 before 3.4.16-0+deb11u2, plus listed versions
3.4.10-0+deb11u13.4.16-0+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+deb11u2
wireshark
Debian:13
From an advisory covering 9 CVEs
 before 4.4.13-0+deb13u1, plus listed versions
4.4.7-14.4.8-0exp14.4.9-1
4.4.13-0+deb13u1
wireshark
Mageia:9
From an advisory covering 21 CVEs
 before 4.0.17-1.2.mga9
4.0.17-1.2.mga9
wireshark
openEuler:24.03-LTS-SP1
 before 4.4.10-3.oe2403sp1
4.4.10-3.oe2403sp1
wireshark
openEuler:24.03-LTS-SP2
 before 4.4.10-3.oe2403sp2
4.4.10-3.oe2403sp2
wireshark
openEuler:22.03-LTS-SP3
 before 4.4.10-3.oe2203sp3
4.4.10-3.oe2203sp3
Show 25 moreShow less
Affected packages
PackageAffectedFixed
wireshark
openEuler:22.03-LTS-SP4
 before 4.4.10-3.oe2203sp4
4.4.10-3.oe2203sp4
wireshark
openEuler:24.03-LTS
 before 4.4.10-3.oe2403
4.4.10-3.oe2403
wireshark
openEuler:20.03-LTS-SP4
From an advisory covering 4 CVEs
 before 3.6.14-13.oe2003sp4
3.6.14-13.oe2003sp4
wireshark
SUSE:Linux Enterprise Module for Basesystem 15 SP7
From an advisory covering 2 CVEs
 before 3.6.24-150000.3.127.1
3.6.24-150000.3.127.1
wireshark
SUSE:Linux Enterprise Module for Basesystem 15 SP7
From an advisory covering 2 CVEs
 before 4.2.14-150600.18.32.1
4.2.14-150600.18.32.1
wireshark
SUSE:Linux Enterprise Module for Desktop Applications 15 SP7
From an advisory covering 2 CVEs
 before 4.2.14-150600.18.32.1
4.2.14-150600.18.32.1
wireshark
openSUSE:Leap 15.6
From an advisory covering 2 CVEs
 before 4.2.14-150600.18.32.1
4.2.14-150600.18.32.1
wireshark
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5
 before 2.4.16-48.66.1
2.4.16-48.66.1
libvirt
SUSE:Linux Enterprise Module for Basesystem 15 SP7
From an advisory covering 18 CVEs
 before 11.0.0-150700.4.19.1
11.0.0-150700.4.19.1
wireshark
SUSE:Linux Enterprise Module for Basesystem 15 SP7
From an advisory covering 18 CVEs
 before 4.6.4-150700.21.8.1
4.6.4-150700.21.8.1
wireshark
SUSE:Linux Enterprise Module for Desktop Applications 15 SP7
From an advisory covering 18 CVEs
 before 4.6.4-150700.21.8.1
4.6.4-150700.21.8.1
libvirt
SUSE:Linux Enterprise Module for Server Applications 15 SP7
From an advisory covering 18 CVEs
 before 11.0.0-150700.4.19.1
11.0.0-150700.4.19.1
wireshark
SUSE:Linux Enterprise Server 16.0
From an advisory covering 8 CVEs
 before 4.4.13-160000.1.1
4.4.13-160000.1.1
wireshark
SUSE:Linux Enterprise Server for SAP applications 16.0
From an advisory covering 8 CVEs
 before 4.4.13-160000.1.1
4.4.13-160000.1.1
wireshark
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
1.10.2-11.10.3-11.10.5-1ubuntu11.10.5-21.10.6-1
Show 9 moreShow less
1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.12.6.3-1~ubuntu14.04.12.6.4-2~ubuntu14.04.12.6.5-1~ubuntu14.04.12.6.6-1~ubuntu14.04.02.6.8-1~ubuntu14.04.0~esm12.6.10-1~ubuntu14.04.0~esm12.6.10-1~ubuntu14.04.0~esm22.6.10-1~ubuntu14.04.0~esm3
 None known
wireshark
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1.12.7+g7fc8978-11.12.8+g5b6e543-22.0.1+g59ea380-3build12.0.2+ga16e22e-12.2.6+g32dac6a-2ubuntu0.16.04
Show 8 moreShow less
2.6.3-1~ubuntu16.04.12.6.4-2~ubuntu16.04.02.6.5-1~ubuntu16.04.02.6.6-1~ubuntu16.04.02.6.8-1~ubuntu16.04.02.6.10-1~ubuntu16.04.02.6.10-1~ubuntu16.04.0+esm12.6.10-1~ubuntu16.04.0+esm2
 None known
wireshark
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
2.4.2-12.4.3-12.4.4-12.4.5-12.6.3-1~ubuntu18.04.1
Show 7 moreShow less
2.6.4-2~ubuntu18.04.02.6.5-1~ubuntu18.04.02.6.6-1~ubuntu18.04.02.6.8-1~ubuntu18.04.02.6.10-1~ubuntu18.04.02.6.10-1~ubuntu18.04.0+esm12.6.10-1~ubuntu18.04.0+esm2
 None known
wireshark
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
3.0.5-13.0.7-13.2.1-13.2.2-13.2.3-13.2.3-1ubuntu0.1~esm13.2.3-1ubuntu0.1~esm2
 None known
wireshark
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
3.4.7-1~exp13.4.9-13.6.2-1ubuntu13.6.2-23.6.2-2ubuntu0.1~esm1
 None known
wireshark
Ubuntu:24.04:LTS
 All versions, plus listed versions
4.0.8-14.0.10-14.0.11-14.2.0-14.2.2-14.2.2-1.1build14.2.2-1.1build24.2.2-1.1build3
 None known
wireshark
Ubuntu:25.10
 All versions, plus listed versions
4.4.5-14.4.6-24.4.6-2build14.4.7-1
 None known
wireshark
Ubuntu:26.10
 All versions, plus listed versions
4.6.4-14.6.6-14.6.6-24.6.6-2build1
 None known
wireshark
Ubuntu:26.04:LTS
 All versions, plus listed versions
4.4.7-14.6.0-14.6.1-24.6.2-34.6.3-14.6.4-1
 None known
wireshark
openSUSE:Tumbleweed
From an advisory covering 2 CVEs
 before 4.6.2-1.1
4.6.2-1.1
wireshark
openSUSE:Leap 16.0
From an advisory covering 8 CVEs
 before 4.4.13-160000.1.1
4.4.13-160000.1.1

History

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

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

In short

CVE-2025-13946 is a medium vulnerability (CVSS 5.5) in Wireshark, published December 3, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.16%, the 5th percentile. Fixed in wireshark 4.0.17-0+deb12u2.

References

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