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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

HIGH
7.1
CVSS Score
Published: September 10, 2026 at 10:52 AM UTC
Updated: September 10, 2026 at 04:18 PM UTC
1 product affected across 1 vendorESP32-audioI2S

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Severity
HIGH7.1
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

ESP32-audioI2S· SCHREIBFAUL1
60%
3.4.4 ≤ v ≤ 4.0.03.4.4

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (8)

Issue Tracking
Source: cverecord
https://github.com/schreibfaul1/ESP32-audioI2S/issues/1380
PatchIssue Tracking
Source: cverecord
https://github.com/schreibfaul1/ESP32-audioI2S/pull/1381
Patch
Source: cverecord
https://github.com/schreibfaul1/ESP32-audioI2S/commit/4dc4614b9dab2de7b342d682b1c18b109d75b677
Technical Description
Source: cverecord
https://github.com/schreibfaul1/ESP32-audioI2S/blob/490ff729eca344f06581f3e9bda9cfba948fd5a1/src/Audio.cpp#L2526-L2531
Technical Description
Source: cverecord
https://github.com/schreibfaul1/ESP32-audioI2S/blob/490ff729eca344f06581f3e9bda9cfba948fd5a1/src/Audio.cpp#L2629-L2635
Technical Description
Source: cverecord
https://github.com/schreibfaul1/ESP32-audioI2S/blob/f01ad7923dcf3355eeca7fb99bf8a4d9945e7478/src/Audio.cpp#L2270-L2276
Product
Source: cverecord
https://github.com/schreibfaul1/ESP32-audioI2S
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/esp32-audioi2s-3.4.4-through-4.0.0-heap-based-out-of-bounds-read-via-shadowed-length-parameter-in-read-id3-header

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHVulnCheck
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-125

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