CVE-2026-7375Public exploitNetwork attack vector

Application hang via zero-length UDS fields

Published Apr 30, 2026 · Updated Apr 30, 2026

Infinite-loop flaw in the UDS dissector in Wireshark 4.4.0 through 4.4.14 and 4.6.0 through 4.6.4 allows attackers to hang the application. Within dissect_uds_internal(), a 0x00 addressAndLengthFormatIdentifier yields zero-length address and size fields, so the DDDI loop never advances its offset. A crafted live UDS packet or an opened capture file triggers the deterministic hang and consumes one CPU core, without memory corruption or code execution.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Infinite-loop flaw in the UDS dissector in Wireshark 4.4.0 through 4.4.14 and 4.6.0 through 4.6.4 allows attackers to hang the application. Within dissect_uds_internal(), a 0x00 addressAndLengthFormatIdentifier yields zero-length address and size fields, so the DDDI loop never advances its offset. A crafted live UDS packet or an opened capture file triggers the deterministic hang and consumes one CPU core, without memory corruption or code execution.

The record

CVE
CVE-2026-7375
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-835, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 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=4.4.0 <4.4.15
  2. Affected versionversion=4.6.0 <4.6.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=4.4.0 <4.4.15; version=4.6.0 <4.6.5

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5GitLab Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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.

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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-835Loop with Unreachable Exit Condition ('Infinite Loop')
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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