Controller crash via receive-buffer write-before-check
Published Aug 27, 2026 · Updated Aug 27, 2026
Out-of-bounds write in Bendix EC80 Brake ECU versions Z228999, Z266494, and Z286098 allows physically proximate attackers to crash the ECU. The SCI2 EDGE receive path's sub_EC803E append routine writes frame data at a stale offset before validating the 0x54-byte buffer limit. Exploitation requires adjacent J2497 access and a timed interrupt-and-timeout sequence; successful memory corruption establishes an arbitrary write primitive and stops the brake controller.
Summary
What happened
Out-of-bounds write in Bendix EC80 Brake ECU versions Z228999, Z266494, and Z286098 allows physically proximate attackers to crash the ECU. The SCI2 EDGE receive path's sub_EC803E append routine writes frame data at a stale offset before validating the 0x54-byte buffer limit. Exploitation requires adjacent J2497 access and a timed interrupt-and-timeout sequence; successful memory corruption establishes an arbitrary write primitive and stops the brake controller.
The record
- CVE
- CVE-2026-68967
- Published
- Aug 27, 2026
- Updated
- Aug 27, 2026
- Vendor
- Bendix Commercial Vehicle Systems LLC
- Product
- EC80 Brake ECU
- Classifications
- CWE-787, T0814
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 27, 2026CVE publishedPublication date reported by the CVE source.
- Aug 27, 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?
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- Affected versionversion=Z228999
- Affected versionversion=Z266494
- Affected versionversion=Z286098
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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Public exploit references
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Technologies
Your stack
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Your stack
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