Device crash via offset-shifted GNSS parser state
Published Sep 10, 2026 · Updated Sep 10, 2026
Type confusion in Zephyr RTOS 4.4.0 through 4.4.1 allows physically proximate attackers to crash devices via spoofed GNSS input. HL78xx NMEA callbacks cast the device-data base as match_data even though affected builds place that structure at a nonzero offset, causing GSV parsing to write through a bogus satellite pointer. Reachability requires an HL78xx GNSS device with NMEA and satellite parsing active; the expected result is a crash, with adjacent-memory corruption possible on MMU-less targets.
Summary
What happened
Type confusion in Zephyr RTOS 4.4.0 through 4.4.1 allows physically proximate attackers to crash devices via spoofed GNSS input. HL78xx NMEA callbacks cast the device-data base as match_data even though affected builds place that structure at a nonzero offset, causing GSV parsing to write through a bogus satellite pointer. Reachability requires an HL78xx GNSS device with NMEA and satellite parsing active; the expected result is a crash, with adjacent-memory corruption possible on MMU-less targets.
The record
- CVE
- CVE-2026-15461
- Published
- Sep 10, 2026
- Updated
- Sep 10, 2026
- Vendor
- Zephyr Project
- Product
- Zephyr RTOS
- Classifications
- Unavailable
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 10, 2026CVE publishedPublication date reported by the CVE source.
- Sep 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=4.4.0 <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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