{"cve":{"cve_id":"CVE-2026-25508","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00204,"epss_percentile":0.10381,"epss_as_of":"2026-06-23","description":"ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.5.2, 5.4.3, 5.3.4, 5.2.6, and 5.1.6, an out-of-bounds read vulnerability was reported in the BLE ATT Prepare Write handling of the BLE provisioning transport (protocomm_ble). The issue can be triggered by a remote BLE client while the device is in provisioning mode. The transport accumulated prepared-write fragments in a fixed-size buffer but incorrectly tracked the cumulative length. By sending repeated prepare write requests with overlapping offsets, a remote client could cause the reported length to exceed the allocated buffer size. This inflated length was then passed to provisioning handlers during execute-write processing, resulting in an out-of-bounds read and potential memory corruption. This issue has been patched in versions 5.5.3, 5.4.4, 5.3.5, 5.2.7, and 5.1.7.","published_at":"2026-02-04T17:58:28.502000Z","last_modified_at":null,"cvss_v3_score":6.3,"cvss_v3_vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-125"],"nvd_references":["https://github.com/espressif/esp-idf/security/advisories/GHSA-9j5x-rf36-54x9","https://github.com/espressif/esp-idf/commit/0540c85140c2c06c0cbecc8843277ea676d5c4a9","https://github.com/espressif/esp-idf/commit/1ff264abf2504cade46f0ce3a03f821310bcf6d7","https://github.com/espressif/esp-idf/commit/47552ff4fd824caf38215468ebd2f31fb5f36d70","https://github.com/espressif/esp-idf/commit/4c3fdcd316f780bab4ae5aa73c9626ea9fe24ac6","https://github.com/espressif/esp-idf/commit/894c28afe3f2f8f31ff25b64191883517dddb5cf","https://github.com/espressif/esp-idf/commit/cde7b7362adc15638c141c249681cbe5d23de663","https://github.com/espressif/esp-idf/commit/dba9a7dc01e4dab14c77d328f6a6f46369aeee63"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:29:25.440717Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"A","value_label":"Adjacent"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"R","value_label":"Required"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"espressif","vendor_name":"espressif","product_slug":"esp-idf","product_name":"esp-idf","version_start":"= 5.5.2","version_start_inclusive":true,"version_end":"= 5.5.2","version_end_inclusive":true,"cpe23_uri":"cve5:espressif:esp-idf:= 5.5.2:= 5.5.2"},{"vendor_slug":"espressif","vendor_name":"espressif","product_slug":"esp-idf","product_name":"esp-idf","version_start":"= 5.4.3","version_start_inclusive":true,"version_end":"= 5.4.3","version_end_inclusive":true,"cpe23_uri":"cve5:espressif:esp-idf:= 5.4.3:= 5.4.3"},{"vendor_slug":"espressif","vendor_name":"espressif","product_slug":"esp-idf","product_name":"esp-idf","version_start":"= 5.3.4","version_start_inclusive":true,"version_end":"= 5.3.4","version_end_inclusive":true,"cpe23_uri":"cve5:espressif:esp-idf:= 5.3.4:= 5.3.4"},{"vendor_slug":"espressif","vendor_name":"espressif","product_slug":"esp-idf","product_name":"esp-idf","version_start":"= 5.2.6","version_start_inclusive":true,"version_end":"= 5.2.6","version_end_inclusive":true,"cpe23_uri":"cve5:espressif:esp-idf:= 5.2.6:= 5.2.6"},{"vendor_slug":"espressif","vendor_name":"espressif","product_slug":"esp-idf","product_name":"esp-idf","version_start":"= 5.1.6","version_start_inclusive":true,"version_end":"= 5.1.6","version_end_inclusive":true,"cpe23_uri":"cve5:espressif:esp-idf:= 5.1.6:= 5.1.6"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/espressif/esp-idf/security/advisories/GHSA-9j5x-rf36-54x9","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/espressif/esp-idf/commit/0540c85140c2c06c0cbecc8843277ea676d5c4a9","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/espressif/esp-idf/commit/1ff264abf2504cade46f0ce3a03f821310bcf6d7","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/espressif/esp-idf/commit/47552ff4fd824caf38215468ebd2f31fb5f36d70","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/espressif/esp-idf/commit/4c3fdcd316f780bab4ae5aa73c9626ea9fe24ac6","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/espressif/esp-idf/commit/894c28afe3f2f8f31ff25b64191883517dddb5cf","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/espressif/esp-idf/commit/cde7b7362adc15638c141c249681cbe5d23de663","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/espressif/esp-idf/commit/dba9a7dc01e4dab14c77d328f6a6f46369aeee63","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-02-04T17:58:28.502000Z","label":"CVE 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