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Fencer Vulns
medium 5.5

CVE-2021-22207 json

Excessive memory consumption in MS-WSP dissector in Wireshark 3.4.0 to 3.4.4 and 3.2.0 to 3.2.12 allows denial of service via packet inject…

published 2021-04-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9353

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

Excessive memory consumption in MS-WSP dissector in Wireshark 3.4.0 to 3.4.4 and 3.2.0 to 3.2.12 allows denial of service via packet injection or crafted capture file

Patch / fix

  • wireshark Debian 14, Debian 13, Debian 12 3.4.7-1

debian advisories DEBIAN-CVE-2021-22207

  • wireshark SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +14 more 3.4.5-3.53.1
  • sbc SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +14 more 1.3-3.2.1
  • libvirt SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.0.0-9.37.21
  • libqt5-qtmultimedia SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +6 more 5.9.7-7.2.1

suse advisories SUSE-SU-2021:2125-1

  • wireshark openSUSE Tumbleweed 3.4.8-1.2
  • wireshark openSUSE Leap 15.3 3.4.5-3.53.1
  • sbc openSUSE Leap 15.3 1.3-3.2.1
  • wireshark openSUSE Leap 15.2 3.4.5-lp152.2.12.1

opensuse advisories openSUSE-SU-2024:11513-1openSUSE-SU-2021:2125-1openSUSE-SU-2021:0909-1

  • wireshark Alpine 3.24, Alpine 3.23, Alpine 3.22 +9 more 3.4.5-r0

alpine advisories ALPINE-CVE-2021-22207

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 CBL-Mariner 2.0 3.4.14-1

azure linux advisories AZL-7405

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • wireshark-cli Arch Linux 3.4.5-1

arch linux advisories AVG-1864

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-2021-22207 updated cvss 7.5

wireshark: MS-WSP dissector excessive memory consumption

  • Red Hat Enterprise Linux 6 wireshark, wireshark-gnome Red Hat Enterprise Linux 7 wireshark, wireshark-gnome
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 wireshark, wireshark-cli
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux 9 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

2.02% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • gitlab.com https://gitlab.com/wireshark/wireshark/-/issues/17331 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/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

Affected products

  • The Wireshark Foundation Wireshark

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns 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.