Buffer overflow via unchecked BLE connection parameters
Published Sep 19, 2025 · Updated Sep 19, 2025
Buffer overflow in Zephyr RTOS 4.1.0 and earlier allows physically proximate attackers to corrupt memory via crafted BLE responses. The le_conn_rsp handler accepts peer-supplied CID, MTU, and MPS values without validation; a small MTU triggers integer underflow in ATT and pushes excess data into a buffer. The path is reachable when the device initiates a BLE connection request, without authentication or user interaction, and can interrupt service or cause limited data exposure or modification.
Summary
What happened
Buffer overflow in Zephyr RTOS 4.1.0 and earlier allows physically proximate attackers to corrupt memory via crafted BLE responses. The le_conn_rsp handler accepts peer-supplied CID, MTU, and MPS values without validation; a small MTU triggers integer underflow in ATT and pushes excess data into a buffer. The path is reachable when the device initiates a BLE connection request, without authentication or user interaction, and can interrupt service or cause limited data exposure or modification.
The record
- CVE
- CVE-2025-10458
- Published
- Sep 19, 2025
- Updated
- Sep 19, 2025
- Vendor
- Zephyr Project
- Product
- Zephyr RTOS
- Classifications
- CWE-130, T1499.004
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 19, 2025CVE publishedPublication date reported by the CVE source.
- Sep 19, 2025Record 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=* <=4.1.0
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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