CVE-2026-76923

Crash via unchecked XAPL field offsets

Published Aug 19, 2026 · Updated Aug 20, 2026

Out-of-bounds read in Wireshark before 4.4.18 and 4.6.8 allows attackers to crash the application via malformed Bluetooth HFP traffic or capture files. In packet-bthfp.c, the Bluetooth HFP dissector assumes the first headset-role +XAPL accessory parameter contains three four-digit fields and performs fixed four-byte conversions at offsets 0, 5, and 10 without validating the parameter length. Reachability requires getting a malformed packet onto the analyzed traffic or persuading a user to open a crafted capture file, and the grounded impact is limited to an application crash.

CVSS severity5.5
Medium
EPSS probability0.10%
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 before 4.4.18 and 4.6.8 allows attackers to crash the application via malformed Bluetooth HFP traffic or capture files. In packet-bthfp.c, the Bluetooth HFP dissector assumes the first headset-role +XAPL accessory parameter contains three four-digit fields and performs fixed four-byte conversions at offsets 0, 5, and 10 without validating the parameter length. Reachability requires getting a malformed packet onto the analyzed traffic or persuading a user to open a crafted capture file, and the grounded impact is limited to an application crash.

The record

CVE
CVE-2026-76923
Published
Aug 19, 2026
Updated
Aug 20, 2026
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-125
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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 <4.4.18
  2. Affected versionversion=4.6.0 <4.6.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=4.4.0 <4.4.18; version=4.6.0 <4.6.8

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.

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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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