Memory corruption via unchecked NFC pipe identifier
Published Feb 27, 2025 · Updated Aug 5, 2026
Out-of-bounds write in the Linux kernel NFC NCI subsystem allows physically proximate attackers to corrupt kernel memory via NFC traffic. The nci_hci_create_pipe() function returns an unsigned pipe identifier without first ensuring that it is below NCI_HCI_MAX_PIPES, allowing nci_hci_connect_gate() to access pipe state out of bounds. Reachability requires an NFC-capable system and nearby control of NFC traffic; the published record establishes memory corruption but no specific crash or code-execution outcome.
Summary
What happened
Out-of-bounds write in the Linux kernel NFC NCI subsystem allows physically proximate attackers to corrupt kernel memory via NFC traffic. The nci_hci_create_pipe() function returns an unsigned pipe identifier without first ensuring that it is below NCI_HCI_MAX_PIPES, allowing nci_hci_connect_gate() to access pipe state out of bounds. Reachability requires an NFC-capable system and nearby control of NFC traffic; the published record establishes memory corruption but no specific crash or code-execution outcome.
The record
- CVE
- CVE-2025-21735
- Published
- Feb 27, 2025
- Updated
- Aug 5, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Feb 27, 2025CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=0 <*
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Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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