CVE-2022-0582Public exploitNetwork attack vector

Process crash via misaligned CSN.1 store

Published Feb 14, 2022 · Updated Nov 3, 2025

Unaligned access in Wireshark 3.4.0 through 3.4.11 and 3.6.0 through 3.6.1 allows attackers to crash it via crafted packets. At packet-csn1.c line 773, the CSN.1 dissector stores a 16-bit value through a pointer that lacks the required two-byte alignment. No authentication is required for injected traffic; the capture-file path instead requires a user to open attacker-supplied data, and the reported consequence is process termination only.

CVSS severity6.3
Medium
EPSS probability1.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Unaligned access in Wireshark 3.4.0 through 3.4.11 and 3.6.0 through 3.6.1 allows attackers to crash it via crafted packets. At packet-csn1.c line 773, the CSN.1 dissector stores a 16-bit value through a pointer that lacks the required two-byte alignment. No authentication is required for injected traffic; the capture-file path instead requires a user to open attacker-supplied data, and the reported consequence is process termination only.

The record

CVE
CVE-2022-0582
Published
Feb 14, 2022
Updated
Nov 3, 2025
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-476
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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
9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5SUSECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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-476NULL Pointer Dereference

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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