Information exposure via undersized PTP TIME TLV
Published Aug 26, 2026 · Updated Aug 26, 2026
Out-of-bounds access in the PTP parser in Zephyr RTOS 3.7.0 through 4.4.1 allows adjacent attackers to read and alter in-object message data. The tlv_mgmt_post_recv PTP_MGMT_TIME case treated short management data as a 10-byte timestamp, byte-swapped it, and wrote it back without a minimum-length check. Reachability requires CONFIG_PTP and access to the local PTP segment; the bounded consequence is minor adjacent-byte exposure and corruption of the parsed TIME value, without a reported crash or past-allocation write.
Summary
What happened
Out-of-bounds access in the PTP parser in Zephyr RTOS 3.7.0 through 4.4.1 allows adjacent attackers to read and alter in-object message data. The tlv_mgmt_post_recv PTP_MGMT_TIME case treated short management data as a 10-byte timestamp, byte-swapped it, and wrote it back without a minimum-length check. Reachability requires CONFIG_PTP and access to the local PTP segment; the bounded consequence is minor adjacent-byte exposure and corruption of the parsed TIME value, without a reported crash or past-allocation write.
The record
- CVE
- CVE-2026-13481
- Published
- Aug 26, 2026
- Updated
- Aug 26, 2026
- Vendor
- Zephyr Project
- Product
- Zephyr RTOS
- Classifications
- Unavailable
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 26, 2026CVE publishedPublication date reported by the CVE source.
- Aug 26, 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=3.7.0 <4.4.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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