CVE-2026-95394Public exploitHinoki check available

CPU exhaustion via unbounded timestamp normalization loop

Published Sep 29, 2026 · Updated Sep 29, 2026

Denial of service in Wireshark 4.4.0 through 4.4.18 and 4.6.0 through 4.6.8 lets attackers stall trace analysis via a crafted NetMon file. In wiretap/netmon.c, netmon_process_record() normalizes an attacker-controlled timestamp delta with a one-second-at-a-time loop that can run billions of times. The victim must open or ingest the supplied capture; the demonstrated consequence is sustained CPU use, not code execution or data disclosure.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in Wireshark 4.4.0 through 4.4.18 and 4.6.0 through 4.6.8 lets attackers stall trace analysis via a crafted NetMon file. In wiretap/netmon.c, netmon_process_record() normalizes an attacker-controlled timestamp delta with a one-second-at-a-time loop that can run billions of times. The victim must open or ingest the supplied capture; the demonstrated consequence is sustained CPU use, not code execution or data disclosure.

The record

CVE
CVE-2026-95394
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 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 <4.4.19
  2. Affected versionversion=4.6.0 <4.6.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=4.4.0 <4.4.19; version=4.6.0 <4.6.9

Published CVSS scores

5.5Upstream issue reporterCVSS: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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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