Wireshark v4.4.18

Wireshark 4.4.18 Release Notes

What is Wireshark?

Wireshark is the world’s most popular network protocol analyzer. It is used for troubleshooting, analysis, development and education. Wireshark is hosted by the Wireshark Foundation, a nonprofit which promotes protocol analysis education. Wireshark and the foundation depend on your contributions in order to do their work! If you or your organization would like to contribute or become a sponsor, please visit wiresharkfoundation.org. If you use Wireshark professionally or you just want to learn more about protocol analysis, you should join us at SharkFest, the Wireshark developer and user conference. You can also become a Wireshark Certified Analyst! Official Wireshark training and certification are available from the Wireshark Foundation.

What’s New

Bug Fixes

The following vulnerabilities have been fixed:

• wnpa-sec-2026-64 sharkd crash. Issue 21395.
• wnpa-sec-2026-65 sharkd crash. Issue 21399.
• wnpa-sec-2026-66 UMTS FP protocol dissector crash. Issue 21413.
• wnpa-sec-2026-67 RDP protocol dissector crash. Issue 21396.
• wnpa-sec-2026-69 Dissection engine reassembly crash. Issue 21423.
• wnpa-sec-2026-70 BUSMASTER file parser abnormal exit. Issue 21435.
• wnpa-sec-2026-71 Tektronix K12xx file parser crash. Issue 21414.
• wnpa-sec-2026-72 ERF file parser crash. Issue 21415.
• wnpa-sec-2026-73 Bluetooth Attribute Protocol dissector crash. Issue 21424.
• wnpa-sec-2026-74 Catapult DCT2000 file parser crash. Issue 21427.
• wnpa-sec-2026-75 C12.22 protocol dissector crash. Issue 21439.
• wnpa-sec-2026-76 CMS protocol dissector crash. Issue 21446.
• wnpa-sec-2026-77 H.245 protocol dissector crash. Issue 21447.
• wnpa-sec-2026-78 Kerberos protocol dissector crash. Issue 21449.
• wnpa-sec-2026-79 Bluetooth HFP Profile protocol dissector crash. Issue 21451.
• wnpa-sec-2026-80 Bluetooth BR/EDR FHS protocol dissector crash. Issue 21452.
• wnpa-sec-2026-81 3gpp phone log file parser crash. Issue 21454.
• wnpa-sec-2026-83 CMS protocol dissector crash. Issue 21457, Issue 21458.
• wnpa-sec-2026-84 Pcapng file parser crash. Issue 21460.
• wnpa-sec-2026-85 SSH protocol dissector crash. Issue 21465.
• wnpa-sec-2026-86 ESS protocol dissector crash. Issue 21467.
• wnpa-sec-2026-87 X.509IF protocol dissector crash. Issue 21469. CVE-2026-xxx.
• wnpa-sec-2026-88 RRC protocol dissector crash. Issue 21478.
• wnpa-sec-2026-89 C12.22 protocol dissector crash. Issue 21480.
• wnpa-sec-2026-91 Bluetooth AVRCP Profile protocol dissector crash. Issue 21488. The following bugs have been fixed:
• Wireshark Version 4.6.6 - File Capture Properties is excessively slow and hangs Wireshark on Windows. Issue 21337.
• Wireshark misdecodes S-NSSAI location validity information IE (5G NAS) Issue 21411.
• Wireshark misdecodes NSAG information IE (5G NAS) Issue 21412.
• Fuzz job UTF-8 encoding issue: fuzz-2026-07-17-15393056954.pcap. Issue 21419.
• Wireshark misdecodes UE security capability IE (5G NAS) Issue 21431.
• Wireshark misdecodes Registration wait range IE (5G NAS) Issue 21432.
• Wireshark misdecodes Extended CAG information IE (5G NAS) Issue 21433.
• Stack buffer overflow in K12/RF5 writer. Issue 21436.
• packet-knxip: Secure Wrapper size-offset causes NULL deref / SEGV when decrypting. Issue 21444.
• wiretap/rtpdump: swapped caplen/len on truncated samples. Issue 21445.
• Sniffer REC_HEADER2 error path over-reads stack buffer. Issue 21461.
• Deep NetLog JSON nesting exhausts the native stack. Issue 21462.
• androiddump signed btsnoop length causes global out-of-bounds read. Issue 21464.
• Wireshark misdecodes SOR transparent container IE (5G NAS) Issue 21472.
• Unbounded Daintree timestamp fraction causes signed integer overflow. Issue 21473.
• Wireshark misdecodes SOR-CMCI of SOR transparent container IE (5G NAS) Issue 21477.
• Wireshark misdecodes Service level AA container (5GSM NAS) Issue 21479.

New and Updated Features

New Protocol Support

There are no new protocols in this release.

Updated Protocol Support

BT ATT, BT AVRCP, BT BR/EDR RF, BT HFP, C12.22, CMS, ESS, FP, H.245, Kerberos, Rlogin, SSH, X.509AF, and X.509IF

New and Updated Capture File Support

3gpp phone log, Busmaster, Catapult DCT2000, Daintree SNA, Endace ERF, pcapng, RTPDump, Sniffer, and Tektronix K12xx

New and Updated File Format Decoding Support

There is no updated file format support in this release.

Prior Versions

Wireshark 4.4.17 included the following changes. See the release notes for details:

• wnpa-sec-2026-52 Catapult DCT2000 protocol dissector crash. Issue 21270.
• wnpa-sec-2026-54 FMP/NOTIFY protocol dissector large loop. Issue 21347.
• wnpa-sec-2026-55 SSH protocol dissector crash. Issue 21378.
• wnpa-sec-2026-57 IEEE 802.11 protocol dissector crash. Issue 21391.
• wnpa-sec-2026-58 Z39.50 protocol dissector crash. Issue 21397.
• wnpa-sec-2026-59 UMTS FP protocol dissector crash. Issue 21398.
• wnpa-sec-2026-60 BLF file parser information disclosure. Issue 21361.
• wnpa-sec-2026-61 Multiple protocol dissector infinite loops. Issue 21275, Issue 21277, Issue 21330, Issue 21383.
• wnpa-sec-2026-62 DBS Etherwatch file parser crash. Issue 21352.
• wnpa-sec-2026-63 Ciscodump extcap crash. Issue 21375.
• Build failure with Qt 6.11 beta. Issue 20965.
• BACapp: Error parsing you-are request. Issue 21260.
• Fuzz job issue: fuzz-2026-05-24-14517548985.pcap. Issue 21272.
• Fuzz job UTF-8 encoding issue: fuzz-2026-06-07-14732586286.pcap. Issue 21331.
• Memory leak in alp-sample1.pcap. Issue 21343.
• Heap-Buffer-Overflow in Wireshark Logcat Parser. Issue 21346.
• HEVC (H.265) dissector: bit_offset not advanced after sub_layer_hrd_parameters() causes false Malformed Packet. Issue 21362.
• dfilter_compile_full: heap-buffer-overflow READ in ws_strptime on a time literal. Issue 21376.
• Wireshark crashes with a HEAP_CORRUPTION error when using the last saved recent_common file. Issue 21379.
• Fuzz job issue: fuzz-2026-06-30-15106674620.pcap. Issue 21381. Wireshark 4.4.16 included the following changes. See the release notes for details:
• vwr: Read of uninitialized memory in pntoh16. Issue 16460.
• vwr: Read of uninitialized memory in find_signature. Issue 16461.
• Fuzz job issue: fuzz-2026-05-02-14184750352.pcap. Issue 21240.
• ROHC NULL Write / Heap Corruption with uncompressed profile and large CID. Issue 21243.
• Fuzz job crash: fuzz-2026-05-18-14414274873.pcap. Issue 21261. Wireshark 4.4.15 included the following changes. See the release notes for details:
• wnpa-sec-2026-08 Monero dissector crash. Issue 21066. CVE-2026-5409.
• wnpa-sec-2026-09 BT-DHT dissector crash. Issue 21067. CVE-2026-5408.
• wnpa-sec-2026-10 FC-SWILS dissector crash. Issue 21070. CVE-2026-5406.
• wnpa-sec-2026-11 SMB2 dissector infinite loop. Issue 21073. CVE-2026-5407.
• wnpa-sec-2026-12 ICMPv6 dissector crash. Issue 21077. CVE-2026-5299.
• wnpa-sec-2026-13 AFP dissector crash. Issue 21088. CVE-2026-5401.
• wnpa-sec-2026-15 K12 RF5 file parser crash. Issue 21094. CVE-2026-5404.
• wnpa-sec-2026-16 SBC codec crash and possible code execution. Issue 21103. CVE-2026-5403.
• wnpa-sec-2026-17 RDP dissector crash and possible code execution. Issue 21105. CVE-2026-5405.
• wnpa-sec-2026-18 AMR-NB codec crash. Issue 21111. CVE-2026-5654.
• wnpa-sec-2026-20 iLBC audio codec crash. Issue 21113. CVE-2026-5657.
• wnpa-sec-2026-21 Profile import crash and possible code execution. Issue 21115. CVE-2026-5656.
• wnpa-sec-2026-22 DCP-ETSI protocol dissector crash. Issue 21122. CVE-2026-5653.
• wnpa-sec-2026-23 BEEP protocol dissector crash. Issue 21120. CVE-2026-6538.
• wnpa-sec-2026-24 ZigBee protocol dissector crash. Issue 21125. CVE-2026-6537.
• wnpa-sec-2026-26 Dissection engine zlib decompression crash. Issue 21097, Issue 21098. CVE-2026-6535.
• wnpa-sec-2026-27 USB HID protocol dissector infinite loop. Issue 21121. CVE-2026-6534.
• wnpa-sec-2026-28 Dissection engine LZ77 decompression crash. Issue 21127. CVE-2026-6533.
• wnpa-sec-2026-29 Kismet protocol dissector crash. Issue 21129, Issue 21128. CVE-2026-6532.
• wnpa-sec-2026-30 SANE protocol dissector infinite loop. Issue 21139. CVE-2026-6531.
• wnpa-sec-2026-31 DCP-ETSI protocol dissector crash. Issue 21144. CVE-2026-6530.
• wnpa-sec-2026-32 iLBC audio codec crash. Issue 21145. CVE-2026-6529.
• wnpa-sec-2026-34 ASN.1 PER protocol dissector crash. Issue 21149. CVE-2026-6527.
• wnpa-sec-2026-37 MySQL protocol dissector crash. Issue 21172. CVE-2026-6524.
• wnpa-sec-2026-38 GNW protocol dissector infinite loop. Issue 21177. CVE-2026-6523.
• wnpa-sec-2026-39 OpenFlow v5 protocol dissector infinite loops. Issue 21182, Issue 21188. CVE-2026-6521.
• wnpa-sec-2026-40 OpenFlow v6 protocol dissector infinite loop. Issue 21181. CVE-2026-6520.
• wnpa-sec-2026-41 MBIM dissector infinite loop. Issue 21184. CVE-2026-6519.
• wnpa-sec-2026-42 RPKI-Router protocol dissector infinite loop. Issue 21186. CVE-2026-6522.
• wnpa-sec-2026-43 GSM RP protocol dissector crash. Issue 21189. CVE-2026-6870.
• wnpa-sec-2026-44 WebSocket protocol dissector crash. Issue 21190. CVE-2026-6869.
• wnpa-sec-2026-45 SMB2 protocol dissector crash. Issue 21191.
• wnpa-sec-2026-46 HTTP protocol dissector crash. Issue 21185. CVE-2026-6868.
• wnpa-sec-2026-47 Sharkd utility memory leak. Issue 21214.
• wnpa-sec-2026-48 Sharkd utility crash. Issue 21206.
• wnpa-sec-2026-49 Sharkd utility crash. Issue 21207.
• wnpa-sec-2026-50 UDS protocol dissector infinite loop. Issue 21225.
• Over large memory usage when uncompressing high compression ratio http payload. Issue 13779.
• WSUG: Enabled Protocols dialog needs an update. Issue 20871.
• SMB2 decryption keys in smb2_seskey_list are not loaded on restart. Issue 21036.
• Fuzz job issue: fuzz-2026-03-01-13307044520.pcap. Issue 21049.
• Window with a message for ssh_strict_fopen. Issue 21051.
• Fuzz job crash: fuzz-2026-03-25-13637733472.pcap. Issue 21117.
• dumpcap TCP@ section-header parsing remote heap corruption. Issue 21132.
• On Windows, the Follow Stream feature output is shown in proportional font after zooming. Issue 21137.
• RTP Streams dialog Time of Day inconsistent behavior. Issue 21138.
• RF4CE NWK Dissector Heap Buffer Overflow (crash/OOB) Issue 21150.
• NetXray/Sniffer Padding Integer Underflow. Issue 21152.
• HTTP/2 ALTSVC/PRIORITY_UPDATE Frame Length Truncation (24-bit to 16-bit) Issue 21155.
• Snort config parser 2 buffer overflows. Issue 21165.
• ESP NULL Encryption Integer Underflow triggers Heap Overflow. Issue 21166.
• Heap buffer overflow in ISO 8583 dissector bin2hex() Issue 21171.
• wslua: NULL pointer dereference in get_dissector when passing an invalid GUID string to an FT_GUID table. Issue 21194.
• Fuzz job UTF-8 encoding issue: fuzz-2026-04-16-13947406035.pcap. Issue 21199.
• Qt: Waterfall bars misisng in conversation overview when "limit to display filter" is active. Issue 21204.
• text2pcap: heap-buffer-overflow in memmove when -P"dissector" payload exceeds reserved space. Issue 21208.
• text2pcap : Stack overflow via unbounded "g_alloca" in regex "seqno" Issue 21209.
• editcap: --novlan integer underflow in sll_remove_vlan_info causes denial of service on short SLL captures. Issue 21210.
• NAS-5GS - Mapping issue between IEI 0x7B and "S-NSSAI location validity information" IE. Issue 21218.
• RTP-MIDI dissector reports incorrect value for MTC Quarter Frame data. Issue 21231. Wireshark 4.4.14 included the following changes. See the release notes for details:
• wnpa-sec-2026-05 USB HID dissector memory exhaustion. Issue 20972. CVE-2026-3201.
• wnpa-sec-2026-07 RF4CE Profile dissector crash. Issue 21009. CVE-2026-3203.
• Bug in decoding 5G NAS message - Extended CAG information list IE. Issue 20946.
• PQC signature algorithm not reported in signature_algorithms. Issue 20953.
• Unexpected JA4 ALPN values when space characters sent. Issue 20966.
• Expert Info seems to have quadratic performance (gets slower and slower) Issue 20970. …