The Wireshark Foundation has officially rolled out Wireshark 4.6.8, a security update that patches 28 distinct vulnerabilities capable of triggering application crashes across the network protocol analyzer.

As the world’s most widely used tool for network troubleshooting, protocol analysis, software development, and education, Wireshark is a staple for security operations centers (SOCs) and network engineering teams.

Addressing these Wireshark DoS vulnerabilities is critical to preventing unexpected analysis outages during live packet captures or incident response workflows.

Wireshark 4.6.8 Patches 28 Vulnerabilities

Tracked under security advisories wnpa-sec-2026-64 through wnpa-sec-2026-91, the patched vulnerabilities span a broad range of protocol dissectors and internal components.

Advisory	Affected component	Vulnerability detail	Related issue(s)
wnpa-sec-2026-64	sharkd	sharkd utility crash	21395
wnpa-sec-2026-65	sharkd	sharkd utility crash	21399
wnpa-sec-2026-66	UMTS FP dissector	Protocol dissector crash	21413
wnpa-sec-2026-67	RDP dissector	Protocol dissector crash	21396
wnpa-sec-2026-68	TTX Logger parser	Capture-file parser crash	21389
wnpa-sec-2026-69	Dissection engine	Reassembly engine crash	21423
wnpa-sec-2026-70	BUSMASTER parser	Abnormal exit while parsing files	21435
wnpa-sec-2026-71	Tektronix K12xx parser	Capture-file parser crash	21414
wnpa-sec-2026-72	Endace ERF parser	Capture-file parser crash	21415
wnpa-sec-2026-73	Bluetooth ATT dissector	Protocol dissector crash	21424
wnpa-sec-2026-74	Catapult DCT2000 parser	Capture-file parser crash	21427
wnpa-sec-2026-75	C12.22 dissector	Protocol dissector crash	21439
wnpa-sec-2026-76	CMS dissector	Protocol dissector crash	21446
wnpa-sec-2026-77	H.245 dissector	Protocol dissector crash	21447
wnpa-sec-2026-78	Kerberos dissector	Protocol dissector crash	21449
wnpa-sec-2026-79	Bluetooth HFP dissector	Protocol dissector crash	21451
wnpa-sec-2026-80	Bluetooth BR/EDR FHS dissector	Protocol dissector crash	21452
wnpa-sec-2026-81	3GPP phone-log parser	Capture-file parser crash	21454
wnpa-sec-2026-82	Ixia IxVeriWave and Vector BLF parsers	Parser crashes on Windows	21455
wnpa-sec-2026-83	CMS dissector	Protocol dissector crash	21457, 21458
wnpa-sec-2026-84	pcapng parser	Capture-file parser crash	21460
wnpa-sec-2026-85	SSH dissector	Protocol dissector crash	21465
wnpa-sec-2026-86	ESS dissector	Protocol dissector crash	21467
wnpa-sec-2026-87	X.509IF dissector	Protocol dissector crash	21469
wnpa-sec-2026-88	RRC dissector	Protocol dissector crash	21478
wnpa-sec-2026-89	C12.22 dissector	Protocol dissector crash	21480
wnpa-sec-2026-90	Gammu DCT3 parser	Capture-file parser crash	21475
wnpa-sec-2026-91	Bluetooth AVRCP dissector	Protocol dissector crash	21488

Several flaws directly impact the sharkd headless daemon, while others target protocol dissectors used across enterprise, wireless, and industrial communications.

Key Affected Dissectors:

Enterprise & Security Protocols: Remote Desktop Protocol (RDP), Kerberos, SSH, H.245, Cryptographic Message Syntax (CMS), and X.509IF.
Wireless & Cellular Stack: Multiple Bluetooth profiles (ATT, HFP, AVRCP, BR/EDR FHS) alongside UMTS FP and RRC cellular protocol dissectors.
Industrial & Utilities: C12.22 smart-metering protocol, which appeared twice across the advisory list.

Most of these vulnerabilities stem from improper handling of malformed or maliciously crafted packet data. An attacker on a monitored network segment or one who tricks an analyst into opening a crafted capture file can trigger a denial-of-service (DoS) condition, crashing the dissection engine.

Historically, unpatched Wireshark code execution risks and dissector crashes have presented severe operational risks when analysts process untrusted network files.

Notably, advisory wnpa-sec-2026-87, involving the X.509IF dissector, carries a pending CVE identifier, signaling its forthcoming inclusion in broader national vulnerability databases.

File parsing components represented another major area of exposure in this release. Wireshark’s input modules for TTX Logger, BUSMASTER, Tektronix K12xx, Endace ERF, Catapult DCT2000, Gammu DCT3 trace files, and 3gpp phone logs each received patches for parser crash conditions.

Windows-specific crash fixes were also deployed for the Ixia IxVeriWave and Vector Informatik BLF file readers.

As detailed in the official Wireshark 4.6.8 Release Notes, the release addresses a long list of stability, memory handling, and accuracy issues beyond core security advisories.

Buffer & Memory Protection: Fixed a stack buffer overflow in the K12/RF5 writer, an out-of-bounds read in the BLF writer when handling truncated VLAN-tagged Ethernet frames, and a NULL-pointer dereference in the KNXIP Secure Wrapper decryption path.
Recursion Guardrails: Corrected a stack-exhaustion flaw triggered by deeply nested NetLog JSON payloads.
5G Telemetry Accuracy: Corrected decoding logic for 5G NAS information elements, including S-NSSAI location validity, UE security capability, and SOR transparent container fields.
UI Performance: Resolved a Windows-specific UI delay affecting the File Capture Properties dialog.

Tracking ongoing Wireshark security updates ensures that network monitoring tools remain resilient against unexpected crash vectors.

Affected Component / Module	Vulnerability ID / Type	Operational Impact
`sharkd` Daemon & Core	wnpa-sec-2026-64 to 91	Denial-of-Service / Engine crash via malformed input
X.509IF Dissector	wnpa-sec-2026-87 (CVE Pending)	Parsing crash when processing invalid X.509 structures
K12 / RF5 File Writer	Stack Buffer Overflow	Memory corruption / Crash during file write operations
BLF File Writer	Out-of-bounds Read	Application crash on truncated VLAN-tagged frames
KNXIP Secure Wrapper	NULL-Pointer Dereference	Decryption path crash during payload analysis
NetLog JSON Parser	Stack Exhaustion	Application crash on deeply nested JSON objects

While Wireshark 4.6.8 does not add brand-new protocol support, it updates dissection capability for ASN.1 BER, ASTERIX, GTPv2, RELOAD, and Rlogin, alongside updated capture file handling for Daintree SNA and pcapng formats.

Additionally, the release documents a packaging adjustment introduced in the 4.6.x release line: on most UN*X distributions, extcap binaries now reside within the libexec directory rather than the standard library path.

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