Heap-data oracle via zero-length AVRCP payload
Published Jun 10, 2026 · Updated Jun 10, 2026
Out-of-bounds read in ESP-IDF 5.2.6, 5.3.5, 5.4.4, 5.5.3, and 6.0 allows physically proximate attackers to infer heap data. In avrc_pars_vendor_cmd(), two PDU handlers dereference the first payload byte before confirming that the payload contains one byte. Reachability requires a paired BR/EDR peer, BlueDroid Classic Bluetooth, and AVRCP target support; responses expose only a validity predicate, although a rare crash is possible.
Summary
What happened
Out-of-bounds read in ESP-IDF 5.2.6, 5.3.5, 5.4.4, 5.5.3, and 6.0 allows physically proximate attackers to infer heap data. In avrc_pars_vendor_cmd(), two PDU handlers dereference the first payload byte before confirming that the payload contains one byte. Reachability requires a paired BR/EDR peer, BlueDroid Classic Bluetooth, and AVRCP target support; responses expose only a validity predicate, although a rare crash is possible.
The record
- CVE
- CVE-2026-46532
- Published
- Jun 10, 2026
- Updated
- Jun 10, 2026
- Vendor
- Espressif Systems
- Product
- ESP-IDF
- Classifications
- CWE-125
- Attack vector
- adjacent
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 10, 2026CVE publishedPublication date reported by the CVE source.
- Jun 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion== 5.2.6
- Affected versionversion== 5.3.5
- Affected versionversion== 5.4.4
- Affected versionversion== 5.5.3
- Affected versionversion== 6.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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