Out-of-bounds Read in Schreibfaul1 Esp32-Audioi2s
CVE-2026-87961
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/schreibfaul1/ESP32-audioI2S/issues/1380 (issue-tracking)
- github.com/schreibfaul1/ESP32-audioI2S/pull/1381 (issue-tracking, patch)
- github.com/schreibfaul1/ESP32-audioI2S/commit/4dc4614b9dab2de7b342d682b1c18b109… (patch)
- github.com/schreibfaul1/ESP32-audioI2S/blob/490ff729eca344f06581f3e9bda9cfba948… (technical-description)
- github.com/schreibfaul1/ESP32-audioI2S/blob/490ff729eca344f06581f3e9bda9cfba948… (technical-description)
- github.com/schreibfaul1/ESP32-audioI2S/blob/f01ad7923dcf3355eeca7fb99bf8a4d9945… (technical-description)
- github.com/schreibfaul1/ESP32-audioI2S (product)
- www.vulncheck.com/advisories/esp32-audioi2s-3.4.4-through-4.0.0-heap-based-out-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-87961?
- CVE-2026-87961 is a high-severity vulnerability in Schreibfaul1 Esp32-Audioi2s, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-09-10.
- How severe is CVE-2026-87961?
- High severity. CVSS v3 base score is 7.1 out of 10.