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Vulnerability record · CVE-2025-68474 · published 27 December 2025

CVE-2025-68474: Espressif esp-idf out-of-bounds write vulnerability

EEspressif · Esp Idf

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 avrc_vendor_msg() function of the ESP-IDF BlueDroid AVRCP stack, the allocated buffer size was validated using AVRC_MIN_CMD_LEN (20 bytes). However, the actual fixed header data written before the vendor payload exceeds this value. This totals 29 bytes written before p_msg->p_vendor_data is copied. Using the old AVRC_MIN_CMD_LEN could allow an out-of-bounds write if vendor_len approaches the buffer limit. For commands where vendor_len is large, the original buffer allocation may be insufficient, causing writes beyond the allocated memory. This can lead to memory corruption, crashes, or other undefined behavior. The overflow could be larger when assertions are disabled.

6.1 CVSS 4.0 Medium EPSS 0.32% · top 77.5% CWE-787 · Out-of-bounds write
6.1CVSS 4.0 base score
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
7 Oct 2026Last modified by NVD

Description

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 avrc_vendor_msg() function of the ESP-IDF BlueDroid AVRCP stack, the allocated buffer size was validated using AVRC_MIN_CMD_LEN (20 bytes). However, the actual fixed header data written before the vendor payload exceeds this value. This totals 29 bytes written before p_msg->p_vendor_data is copied. Using the old AVRC_MIN_CMD_LEN could allow an out-of-bounds write if vendor_len approaches the buffer limit. For commands where vendor_len is large, the original buffer allocation may be insufficient, causing writes beyond the allocated memory. This can lead to memory corruption, crashes, or other undefined behavior. The overflow could be larger when assertions are disabled.

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:L/SI:L/SA:L/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/espressif/esp-idf/commit/0b0b59f2e19cb99dfa1b28c284d1c5c1d276a132 Patch
https://github.com/espressif/esp-idf/commit/565fa98d0cfd58102204c1cb636747e17ee59845 Patch
https://github.com/espressif/esp-idf/commit/8262ee807d5cd425f66304f703eeb3382fb888c0 Patch
https://github.com/espressif/esp-idf/commit/a6c1bc5e3e91ad1cb964ce2c178ee40a5d10a4a0 Patch
https://github.com/espressif/esp-idf/commit/aa0e3d75db995b7137b55349fc92ee684b47092d Patch
https://github.com/espressif/esp-idf/commit/b9ba1e29b65536ab4b670ac099585d09adce0376 Patch
https://github.com/espressif/esp-idf/security/advisories/GHSA-43gh-7r4f-qp57 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2025-68474), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.