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TI-2026-20617 Aliases CVE-2026-25507

ESF-IDF Has Use-after-free Vulnerability in BLE Provisioning

Priority LOW 28CWE-416Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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, a use-after-free vulnerability was reported in the BLE provisioning transport (protocomm_ble) layer. The issue can be triggered by a remote BLE client while the device is in provisioning mode. The vulnerability occurred when provisioning was stopped with keep_ble_on = true. In this configuration, internal protocomm_ble state and GATT metadata were freed while the BLE stack and GATT services remained active. Subsequent BLE read or write callbacks dereferenced freed memory, allowing a connected or newly connected client to trigger invalid memory acces. This issue has been patched in versions 5.5.3, 5.4.4, 5.3.5, 5.2.7, and 5.1.7.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00231 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
espressifesp-idf= 5.5.2; = 5.4.3; = 5.3.4; = 5.2.6; = 5.1.6—No fix listedCNA
  • esp-idf Vendorespressif Affected = 5.5.2; = 5.4.3; = 5.3.4; = 5.2.6; = 5.1.6 Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:espressif:esp-idf:5.1.6:*:*:*:*:*:*:*5.1.6Vulnerableespressif
cpe:2.3:a:espressif:esp-idf:5.2.6:*:*:*:*:*:*:*5.2.6Vulnerableespressif
cpe:2.3:a:espressif:esp-idf:5.3.4:*:*:*:*:*:*:*5.3.4Vulnerableespressif
cpe:2.3:a:espressif:esp-idf:5.4.3:*:*:*:*:*:*:*5.4.3Vulnerableespressif
cpe:2.3:a:espressif:esp-idf:5.5.2:*:*:*:*:*:*:*5.5.2Vulnerableespressif
  • cpe:2.3:a:espressif:esp-idf:5.1.6:*:*:*:*:*:*:* Versions 5.1.6 Vulnerable ·espressif
  • cpe:2.3:a:espressif:esp-idf:5.2.6:*:*:*:*:*:*:* Versions 5.2.6 Vulnerable ·espressif
  • cpe:2.3:a:espressif:esp-idf:5.3.4:*:*:*:*:*:*:* Versions 5.3.4 Vulnerable ·espressif
  • cpe:2.3:a:espressif:esp-idf:5.4.3:*:*:*:*:*:*:* Versions 5.4.3 Vulnerable ·espressif
  • cpe:2.3:a:espressif:esp-idf:5.5.2:*:*:*:*:*:*:* Versions 5.5.2 Vulnerable ·espressif

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-25507

References

Patch 7

Advisory 1

  • TI-2024-22076 Buffer Overflow vulnerability in esp-idf v.5.1 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
  • TI-2026-33125 ESF-IDF: Out-of-Bounds Write in ESP-TEE Secure Service Wrappers CVSS 3.1CRITICAL 9.3
  • TI-2025-32598 ESP-NOW Integer Underflow Vulnerability Advisory CVSS 4.0HIGH 7.2
  • TI-2022-08703 Espressif Bluetooth Mesh Stack Vulnerable to Out-of-bounds Write leading to memory buffer corruption CVSS 3.1HIGH 8.8
  • TI-2021-09371 The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not… CVSS 3.1HIGH 8.8
  • TI-2026-33292 ESF-IDF: Remote Null Pointer Dereference in WebSocket Server CVSS 3.1HIGH 7.5
See all 30 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences