CVE-2025-11626Public exploit

CPU exhaustion via negative MONGO section length

Published Oct 10, 2025 · Updated Oct 10, 2025

Infinite loop in the MONGO dissector in Wireshark 4.4.0 through 4.4.9 and 4.2.0 through 4.2.13 allows attackers to exhaust CPU via malformed packets. dissect_op_msg_section trusts a signed OP_MSG section length; a value of -1 makes it return zero, so the enclosing parser never advances its offset. The condition is reached through an injected packet or a malformed trace file; affected 4.2 releases require Decode As to select MONGO.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Infinite loop in the MONGO dissector in Wireshark 4.4.0 through 4.4.9 and 4.2.0 through 4.2.13 allows attackers to exhaust CPU via malformed packets. dissect_op_msg_section trusts a signed OP_MSG section length; a value of -1 makes it return zero, so the enclosing parser never advances its offset. The condition is reached through an injected packet or a malformed trace file; affected 4.2 releases require Decode As to select MONGO.

The record

CVE
CVE-2025-11626
Published
Oct 10, 2025
Updated
Oct 10, 2025
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-835, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 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=4.2.0 <4.2.14
  2. Affected versionversion=4.4.0 <4.4.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=4.2.0 <4.2.14; version=4.4.0 <4.4.10

Published CVSS scores

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)
Vectorlocal
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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