CVE-2023-1161Network attack vector

Crash via consecutive-segment array overwrite

Published Mar 6, 2023 · Updated Nov 3, 2025

Memory corruption in Wireshark 3.6.0 through 3.6.11 and 4.0.0 through 4.0.3 allows attackers to crash or hang it via crafted packets. The ISO 15765 and ISO 10681 dissectors increment frag_id_high and use the resulting fragment ID to write past the array into an adjacent allocation header after many consecutive segments. A packet injected onto a monitored network reaches the flaw without authentication; opening a crafted capture file requires user interaction, and Wireshark 4.0 crashes while 3.6 can hang.

CVSS severity6.3
Medium
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Wireshark 3.6.0 through 3.6.11 and 4.0.0 through 4.0.3 allows attackers to crash or hang it via crafted packets. The ISO 15765 and ISO 10681 dissectors increment frag_id_high and use the resulting fragment ID to write past the array into an adjacent allocation header after many consecutive segments. A packet injected onto a monitored network reaches the flaw without authentication; opening a crafted capture file requires user interaction, and Wireshark 4.0 crashes while 3.6 can hang.

The record

CVE
CVE-2023-1161
Published
Mar 6, 2023
Updated
Nov 3, 2025
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 6, 2023CVE 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=>=3.6.0, <3.6.12
  2. Affected versionversion=>=4.0.0, <4.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=>=3.6.0, <3.6.12; version=>=4.0.0, <4.0.4

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
6.3GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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