CVE-2026-76922Public exploit

Denial of service via unregistered reassembly table

Published Aug 19, 2026 · Updated Aug 20, 2026

Denial of service in Wireshark before 4.6.8 and 4.4.18 allows attackers to crash the application via crafted Bluetooth BR/EDR traffic. In the BT BR/EDR RF dissector, dissect_btbredr_rf() passes l2cap_msg_reassembly_table to fragment_add_seq_next() even though the table is never registered, leaving NULL callbacks when truncated L2CAP start fragments trigger reassembly. Reachability requires valid BR/EDR connection state and either injected malformed traffic or a crafted capture file, so the consequence is an analyzer crash rather than packet tampering or code execution.

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

Denial of service in Wireshark before 4.6.8 and 4.4.18 allows attackers to crash the application via crafted Bluetooth BR/EDR traffic. In the BT BR/EDR RF dissector, dissect_btbredr_rf() passes l2cap_msg_reassembly_table to fragment_add_seq_next() even though the table is never registered, leaving NULL callbacks when truncated L2CAP start fragments trigger reassembly. Reachability requires valid BR/EDR connection state and either injected malformed traffic or a crafted capture file, so the consequence is an analyzer crash rather than packet tampering or code execution.

The record

CVE
CVE-2026-76922
Published
Aug 19, 2026
Updated
Aug 20, 2026
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-476
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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference

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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