CVE-2026-87961 ESP32-audioI2S 3.4.4 through 4.0.0 Heap-based Out-of-Bounds Read via Shadowed Length Parameter in read_ID3_Header
Attackers can crash ESP32 devices or leak heap memory by sending malicious MP3 files or audio streams to the ESP32-audioI2S library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-87961?
CVE-2026-87961 is a high-severity memory corruption vulnerability in schreibfaul1 ESP32-audioI2S, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
ESP32-audioI2S versions 3.4.4 through 4.0.0 contain a heap-based out-of-bounds read vulnerability in the read_ID3_Header function due to a shadowed length parameter in ID3 synchronized-lyrics processing. Attackers can craft malicious MP3 files or HTTP audio streams with oversized frame size declarations to read past allocated buffer boundaries, causing device crashes or exposing adjacent heap memory.
Weakness: CWE-125
Which versions are affected by CVE-2026-87961?
How do I fix CVE-2026-87961?
No fix has been published for CVE-2026-87961 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-87961 being exploited?
There is no known exploitation of CVE-2026-87961 in the wild and no public exploit code.
Sources
Also known as GHSA-p79f-7v67-j5f7.