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Fencer Intel
high 7.5

CVE-2018-19622 json

In Wireshark 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10, the MMSE dissector could go into an infinite loop.

published 2018-11-29 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-11307

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.2%
EPSS 3.2% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

In Wireshark 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10, the MMSE dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-mmse.c by preventing length overflows.

Patch / fix

  • wireshark Debian 14, Debian 13, Debian 12 2.6.5-1

debian advisories DEBIAN-CVE-2018-19622

  • wireshark Ubuntu 14.04 LTS 2.6.5-1~ubuntu14.04.1
  • wireshark Ubuntu 16.04 LTS 2.6.5-1~ubuntu16.04.0
  • wireshark Ubuntu 18.04 LTS 2.6.5-1~ubuntu18.04.0

ubuntu advisories UBUNTU-CVE-2018-19622

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • wireshark RHEL 7 1.10.14-24.el7
  • wireshark-gnome RHEL 7 1.10.14-24.el7

red hat advisories RHSA-2020:1047

  • wireshark SLES for SAP 15, SLES 15-LTSS, SLE Module for Desktop Applications 15 SP1 +3 more 3.2.2-3.35.2
  • spandsp SLES for SAP 15, SLES 15-LTSS, SLE Module for Desktop Applications 15 SP1 +3 more 0.0.6-3.2.1
  • libmaxminddb SLES for SAP 15, SLES 15-LTSS, SLE Module for Basesystem 15 SP1 +2 more 1.4.2-1.3.1
  • wireshark SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES 12 SP4 +5 more 2.4.11-48.35.1
  • wireshark SLE Module for Desktop Applications 15, SLE Module for Basesystem 15 2.4.11-3.15.1

suse advisories SUSE-SU-2020:0693-1SUSE-SU-2018:4298-1SUSE-SU-2018:4295-1

  • wireshark openSUSE Tumbleweed 3.4.8-1.2
  • wireshark openSUSE Leap 15.1 3.2.2-lp151.2.9.1
  • spandsp openSUSE Leap 15.1 0.0.6-lp151.3.3.1
  • libmaxminddb openSUSE Leap 15.1 1.4.2-lp151.3.3.1

opensuse advisories openSUSE-SU-2024:11513-1openSUSE-SU-2020:0362-1

  • wireshark Alpine 3.24, Alpine 3.23, Alpine 3.22 +13 more 2.6.5-r0
  • wireshark Alpine 3.8, Alpine 3.7 2.4.11-r0

alpine advisories ALPINE-CVE-2018-19622

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • wireshark-cli Arch Linux 2.6.5-1

arch linux advisories AVG-825

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-19622 updated cvss 5.3

wireshark: Infinite loop in the MMSE dissector

  • Red Hat Enterprise Linux 5 wireshark Red Hat Enterprise Linux 6 wireshark, wireshark-gnome
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) wireshark 1.10.14-24.el7, wireshark-gnome 1.10.14-24.el7 Red Hat Enterprise Linux Client Optional (v. 7) wireshark-devel 1.10.14-24.el7, wireshark-debuginfo 1.10.14-24.el7 Red Hat Enterprise Linux Server (v. 7) wireshark 1.10.14-24.el7, wireshark-gnome 1.10.14-24.el7 Red Hat Enterprise Linux Server Optional (v. 7) wireshark-devel 1.10.14-24.el7, wireshark-debuginfo 1.10.14-24.el7 Red Hat Enterprise Linux Workstation (v. 7) wireshark 1.10.14-24.el7, wireshark-gnome 1.10.14-24.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) wireshark-devel 1.10.14-24.el7, wireshark-debuginfo 1.10.14-24.el7
    fixed: vendor fix RHSA-2020:1047
  • Red Hat Enterprise Linux 8 wireshark, wireshark-cli
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.24% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugs.wireshark.org https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15250 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.