CVE-2022-0581Public exploitNetwork attack vector

Process crash via freed CMS OID string

Published Feb 14, 2022 · Updated Nov 3, 2025

Use-after-free in the CMS dissector in Wireshark 3.4.0 through 3.4.11 and 3.6.0 through 3.6.1 allows attackers to crash the process. During two-pass dissection, dissect_cms_T_parameters passes a packet-scoped OID string to a lookup after its storage has been freed. A malformed injected packet reaches the flaw during live capture, while opening a crafted capture file also triggers the crash.

CVSS severity7.5
High
EPSS probability1.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the CMS dissector in Wireshark 3.4.0 through 3.4.11 and 3.6.0 through 3.6.1 allows attackers to crash the process. During two-pass dissection, dissect_cms_T_parameters passes a packet-scoped OID string to a lookup after its storage has been freed. A malformed injected packet reaches the flaw during live capture, while opening a crafted capture file also triggers the crash.

The record

CVE
CVE-2022-0581
Published
Feb 14, 2022
Updated
Nov 3, 2025
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>=3.4.0, <3.4.12
  2. Affected versionversion=>=3.6.0, <3.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=>=3.4.0, <3.4.12; version=>=3.6.0, <3.6.2

Published CVSS scores

6.3GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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