ESF-IDF Has Out-of-Bounds Read in ESP32 Bluetooth SDP Result Handling

published 2025-12-26 10 mo ago modified 2026-10-07 33 d ago also EUVD-2025-205465

cvss: 8.6; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits: 0; none known

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.5.1, 5.4.3, 5.3.4, 5.2.6, 5.1.6, and earlier, in the ESP-IDF Bluetooth host stack (BlueDroid), the function bta_dm_sdp_result() used a fixed-size array uuid_list[32][MAX_UUID_SIZE] to store discovered service UUIDs during the SDP (Service Discovery Protocol) process. On modern Bluetooth devices, it is possible for the number of available services to exceed this fixed limit (32). In such cases, if more than 32 services are discovered, subsequent writes to uuid_list could exceed the bounds of the array, resulting in a potential out-of-bounds write condition.

Patch / fix

fixed in 1 links 7

espressif esp-idf 5.1.7, 5.2.7, 5.3.5, 5.4.4, 5.5.2

github.com/espressif/esp-idf@3286e45 commit
github.com/espressif/esp-idf@4d928f2 commit
github.com/espressif/esp-idf@5b31851 commit
github.com/espressif/esp-idf@6453f57 commit
github.com/espressif/esp-idf@6ca6f42 commit
github.com/espressif/esp-idf@9889edd commit
github.com/espressif/esp-idf@ecb86d3 commit

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 10 mo ago (2025-12-29)

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	0.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N
CNA	4.0	0.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/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
NVD	3.1	8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Affected products

espressif esp-idf

Classification

Weakness

CWE-787 Out-of-bounds Write

References

Sources

CVE List CVE-2025-68473
NVD CVE-2025-68473

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary