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.
CVE-2026-81508
MEDIUMPre-NVD 4.34.3
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: secondary
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 4.3Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.3
- EG Score
- 4.3(low)
- EG Risk
- 24(Track)EG Risk 24/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity43% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
September 24, 2026
Last Modified
September 24, 2026
Advisory Details (5)
Auto-updated Sep 24, 2026Patch available. Sources: github, github_commit.
github_commit
commit ca55d63de82e (espressif/esp-idf)
Fix landed in espressif/esp-idf commit ca55d63de82e — awaiting tagged release
https://github.com/espressif/esp-idf/commit/ca55d63de82e41e2c672bfd2b707fc80911f30cegithub_commit
commit 85d56bcd2661 (espressif/esp-idf)
Fix landed in espressif/esp-idf commit 85d56bcd2661 — awaiting tagged release
https://github.com/espressif/esp-idf/commit/85d56bcd266117e0fe6a6b75511c8e122fda29adgithub_commit
commit 6cb20db4dfee (espressif/esp-idf)
Fix landed in espressif/esp-idf commit 6cb20db4dfee — awaiting tagged release
https://github.com/espressif/esp-idf/commit/6cb20db4dfeee81314d0c55acb82f3f0e7679abegithub_commit
commit 0d118139ff8b (espressif/esp-idf)
Fix landed in espressif/esp-idf commit 0d118139ff8b — awaiting tagged release
https://github.com/espressif/esp-idf/commit/0d118139ff8b7aa87b656c2f4a6421ecaa1f5939github Patch Available
Heap Out-of-Bounds Read in Bluedroid A2DP Sink Media Packet Processing · Advisory · espressif/esp-idf · GitHub
https://github.com/espressif/esp-idf/security/advisories/GHSA-xcpr-5mqp-9qvvWeakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 3× in last 7d / 3× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-24 18:35 UTCEG score recompute
- 2026-09-24 17:57 UTCEG score recompute
- 2026-09-24 17:56 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(4)
What is CVE-2026-81508?
CVE-2026-81508 is a medium vulnerability published on September 24, 2026. 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 btca2dpsinkhandleinc_media() reads a timestamp field from the received media buffer before validating that the packet layout contains the field. A paired BR/EDR audio…
When was CVE-2026-81508 disclosed?
CVE-2026-81508 was first published in the National Vulnerability Database on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-81508?
CVE-2026-81508 has a CVSS v3 base score of 4.3 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-81508?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81508, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-81508
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