Kernel memory disclosure via unterminated bfa buffer
Published Jun 19, 2024 · Updated May 12, 2026
Out-of-bounds read in Linux and Siemens SIMATIC S7-1500 TM MFP GNU/Linux subsystem allows local users to disclose kernel memory via bfa debugfs input. The bfad_debugfs.c handler copies an exact byte count from userspace without appending a NUL terminator, then passes the buffer to sscanf, which reads beyond its allocation. Exploitation requires low-privileged local access and a reachable bfa debugfs interface; the over-read can expose kernel data or interrupt service.
Summary
What happened
Out-of-bounds read in Linux and Siemens SIMATIC S7-1500 TM MFP GNU/Linux subsystem allows local users to disclose kernel memory via bfa debugfs input. The bfad_debugfs.c handler copies an exact byte count from userspace without appending a NUL terminator, then passes the buffer to sscanf, which reads beyond its allocation. Exploitation requires low-privileged local access and a reachable bfa debugfs interface; the over-read can expose kernel data or interrupt service.
The record
- CVE
- CVE-2024-38560
- Published
- Jun 19, 2024
- Updated
- May 12, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- CWE-20, CWE-125
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 19, 2024CVE publishedPublication date reported by the CVE source.
- May 12, 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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Technologies
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Your stack
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