Out-of-bounds read via IPv6 length wraparound
Published Oct 10, 2025 · Updated Oct 10, 2025
Buffer over-read in FreeRTOS-Plus-TCP 4.0.0 through 4.3.3 allows remote authenticated users to trigger out-of-bounds reads via malformed IPv6 packets. IPv6 packet processing trusts the header payload length, allowing an incorrect value to wrap the calculated length, appear erroneously large, bypass existing bounds checks, and drive reads past the received buffer. Only applications with IPv6 support enabled are exposed, and the documented consequences are limited memory disclosure and service interruption.
Summary
What happened
Buffer over-read in FreeRTOS-Plus-TCP 4.0.0 through 4.3.3 allows remote authenticated users to trigger out-of-bounds reads via malformed IPv6 packets. IPv6 packet processing trusts the header payload length, allowing an incorrect value to wrap the calculated length, appear erroneously large, bypass existing bounds checks, and drive reads past the received buffer. Only applications with IPv6 support enabled are exposed, and the documented consequences are limited memory disclosure and service interruption.
The record
- CVE
- CVE-2025-11617
- Published
- Oct 10, 2025
- Updated
- Oct 10, 2025
- Vendor
- Amazon Web Services
- Product
- FreeRTOS-Plus-TCP
- Classifications
- CWE-126, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 10, 2025CVE publishedPublication date reported by the CVE source.
- Oct 10, 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=4.0.0 <4.3.4
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
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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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