CVE-2024-2955Public exploitNetwork attack vector

Process crash via T.38 reassembly use-after-free

Published Mar 26, 2024 · Updated Apr 8, 2026

Use-after-free in Wireshark's T.38 dissector 4.0.0 through 4.0.13 and 4.2.0 through 4.2.3 allows attackers to crash the process. force_reassemble_seq allocates reassembly data that is freed during packet-state reset, but fragment_add_seq later compares the released data. Exploitation requires a malformed T.38 packet on a monitored network or a crafted capture file to be opened, and the bounded consequence is a Wireshark or TShark crash.

CVSS severity7.5
High
EPSS probability1.40%
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 Wireshark's T.38 dissector 4.0.0 through 4.0.13 and 4.2.0 through 4.2.3 allows attackers to crash the process. force_reassemble_seq allocates reassembly data that is freed during packet-state reset, but fragment_add_seq later compares the released data. Exploitation requires a malformed T.38 packet on a monitored network or a crafted capture file to be opened, and the bounded consequence is a Wireshark or TShark crash.

The record

CVE
CVE-2024-2955
Published
Mar 26, 2024
Updated
Apr 8, 2026
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-762, CWE-763, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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=4.0.0 <4.0.14
  2. Affected versionversion=4.2.0 <4.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=4.0.0 <4.0.14; version=4.2.0 <4.2.4

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.8GitLab Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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-762Mismatched Memory Management Routines
CWE-763Release of Invalid Pointer or Reference
T1499.004Endpoint Denial of Service: Application 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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