Service interruption via freed BLE provisioning state
Published Feb 4, 2026 · Updated Feb 4, 2026
Use-after-free in ESP-IDF 5.1.6, 5.2.6, 5.3.4, 5.4.3, and 5.5.2 allows physically proximate attackers to interrupt devices over BLE. When provisioning stops with keep_ble_on enabled, protocomm_ble frees its state and GATT metadata while BLE services stay active, so later read or write callbacks dereference released memory. Exploitation requires radio proximity, an unauthenticated BLE connection while provisioning is active, and user interaction that stops provisioning but retains BLE; consequences include a crash, heap corruption, or control-flow hijacking.
Summary
What happened
Use-after-free in ESP-IDF 5.1.6, 5.2.6, 5.3.4, 5.4.3, and 5.5.2 allows physically proximate attackers to interrupt devices over BLE. When provisioning stops with keep_ble_on enabled, protocomm_ble frees its state and GATT metadata while BLE services stay active, so later read or write callbacks dereference released memory. Exploitation requires radio proximity, an unauthenticated BLE connection while provisioning is active, and user interaction that stops provisioning but retains BLE; consequences include a crash, heap corruption, or control-flow hijacking.
The record
- CVE
- CVE-2026-25507
- Published
- Feb 4, 2026
- Updated
- Feb 4, 2026
- Vendor
- Espressif Systems
- Product
- ESP-IDF
- Classifications
- CWE-416
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 4, 2026CVE publishedPublication date reported by the CVE source.
- Feb 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion== 5.1.6
- Affected versionversion== 5.2.6
- Affected versionversion== 5.3.4
- Affected versionversion== 5.4.3
- Affected versionversion== 5.5.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo