CVE-2024-0207Public exploitNetwork attack vector

Crash via unchecked QPACK stream bounds

Published Jan 3, 2024 · Updated Mar 27, 2026

Out-of-bounds read in Wireshark 4.2.0 allows attackers to crash the HTTP/3 dissector via malformed packets or capture files. The QPACK encoder-stream dissector advances beyond the available buffer before read_qpack_prefixed_integer checks the end pointer. Reachability requires live capture of an attacker-injected packet or user interaction with a crafted trace file, and the bounded consequence is process termination.

CVSS severity7.8
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Wireshark 4.2.0 allows attackers to crash the HTTP/3 dissector via malformed packets or capture files. The QPACK encoder-stream dissector advances beyond the available buffer before read_qpack_prefixed_integer checks the end pointer. Reachability requires live capture of an attacker-injected packet or user interaction with a crafted trace file, and the bounded consequence is process termination.

The record

CVE
CVE-2024-0207
Published
Jan 3, 2024
Updated
Mar 27, 2026
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 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=4.2.0 <4.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=4.2.0 <4.2.1

Published CVSS scores

7.8GitLab Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5NIST NVDCVSS: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-125Out-of-bounds Read
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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