Out-of-bounds read in ESP-IDF - CVE-2026-81508
Published: September 7, 2026
Vulnerability identifier: #VU147293
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-81508
CWE-ID: CWE-125
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose limited heap contents.
The vulnerability exists due to an out-of-bounds read in the Bluedroid A2DP sink media-packet handler (btc_a2dp_sink_handle_inc_media) when processing malformed A2DP media packets. A remote attacker can send a malformed media packet to read adjacent heap memory.
Only builds with BlueDroid Classic Bluetooth and A2DP sink support enabled are affected.
Affected software
ESP-IDF
How to mitigate CVE-2026-81508
Install security update from vendor's website.
ESP-IDF - update to 6.0.2