Withdrawn: this CVE is not a vulnerability
The assigning CNA withdrew CVE-2026-51261 on 31 July 2026, and it carries the Rejected state at CVE.org and NVD. It must not be treated as a live finding. Its pre-withdrawal severity, score and exploitability are withheld below; the record itself is kept because withdrawals are reversible and because the reject reason is the correction worth publishing.
CVE-2026-51261
ESP32-audioI2S Race Condition Leading to Heap Out-of-Bounds Write
Description
Rejected reason: DO NOT USE THIS CVE RECORD. ConsultIDs: none. Reason: This record was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none.
INFO
Published Date :
July 28, 2026, 3:17 p.m.
Last Modified :
July 31, 2026, 3:16 p.m.
Remotely Exploit :
—
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-51261
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-51261 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-51261 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Rejected by [email protected]
Jul. 31, 2026
Action Type Old Value New Value -
CVE Modified by [email protected]
Jul. 31, 2026
Action Type Old Value New Value Changed Description Missing mutex synchronization in AudioBuffer::freeSpace() in schreibfaul1 ESP32-audioI2S 3.4.5 creates a race condition between concurrent tasks. The function calculates available buffer space without protecting shared read/write pointers, returning an incorrectly large value. Trusting this value leads to heap out-of-bounds write, memory corruption, device crash, and arbitrary code execution. Rejected reason: DO NOT USE THIS CVE RECORD. ConsultIDs: none. Reason: This record was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none. Removed CVSS V3.1 CISA-ADP: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Removed CWE CISA-ADP: CWE-362 Removed Reference MITRE: https://github.com/programmervuln/cveadvisory-/blob/main/CVE-2026-51261 Removed Reference MITRE: https://github.com/schreibfaul1/ESP32-audioI2S/blob/master/src/Audio.cpp Removed Affected [{'vendor': 'n/a', 'product': 'n/a', 'versions': [{'status': 'affected', 'version': 'n/a'}]}] Removed SSVC {'id': 'CVE-2026-51261', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-30T16:03:03.967069Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 30, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-362 Added SSVC {'id': 'CVE-2026-51261', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-30T16:03:03.967069Z'} -
New CVE Received by [email protected]
Jul. 28, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'n/a', 'product': 'n/a', 'versions': [{'status': 'affected', 'version': 'n/a'}]}] Added Description Missing mutex synchronization in AudioBuffer::freeSpace() in schreibfaul1 ESP32-audioI2S 3.4.5 creates a race condition between concurrent tasks. The function calculates available buffer space without protecting shared read/write pointers, returning an incorrectly large value. Trusting this value leads to heap out-of-bounds write, memory corruption, device crash, and arbitrary code execution. Added Reference https://github.com/programmervuln/cveadvisory-/blob/main/CVE-2026-51261 Added Reference https://github.com/schreibfaul1/ESP32-audioI2S/blob/master/src/Audio.cpp