CVE-2026-81508 ESF-IDF: Heap Out-of-Bounds Read in Bluedroid A2DP Sink Media Packet Processing
A remote attacker with radio proximity can trigger an out-of-bounds read in the A2DP sink, potentially disclosing limited heap memory contents.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-81508?
CVE-2026-81508 is a medium-severity vulnerability in espressif esp-idf, published on 24 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In 5.5.5, 6.0.1, and 6.1, the BlueDroid A2DP sink function btc_a2dp_sink_handle_inc_media() reads a timestamp field from the received media buffer before validating that the packet layout contains the field. A paired BR/EDR audio source within radio range can send a malformed A2DP media packet to a build with BlueDroid Classic Bluetooth and A2DP sink support enabled, causing an out-of-bounds read into adjacent heap memory and limited disclosure of heap contents. Arbitrary memory disclosure and code execution are not established.
Weakness: CWE-125
Which versions are affected by CVE-2026-81508?
How do I fix CVE-2026-81508?
No fix has been published for CVE-2026-81508 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-81508 being exploited?
There is no known exploitation of CVE-2026-81508 in the wild and no public exploit code.
Sources
Also known as GHSA-xcpr-5mqp-9qvv.