System crash via undersized static command-line allocation
Published May 1, 2024 · Updated May 12, 2026
Buffer overflow in Linux kernel 5.1 and later before applicable fixes allows local users to crash affected systems during startup. The initialization code sizes static_command_line with strlen(boot_command_line) but copies the potentially longer command_line into that allocation. Exploitation requires control of kernel command-line data before boot, and the documented consequence is loss of availability rather than data access or modification.
Summary
What happened
Buffer overflow in Linux kernel 5.1 and later before applicable fixes allows local users to crash affected systems during startup. The initialization code sizes static_command_line with strlen(boot_command_line) but copies the potentially longer command_line into that allocation. Exploitation requires control of kernel command-line data before boot, and the documented consequence is loss of availability rather than data access or modification.
The record
- CVE
- CVE-2024-26988
- Published
- May 1, 2024
- Updated
- May 12, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- CWE-120, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 1, 2024CVE publishedPublication date reported by the CVE source.
- May 12, 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=0 <*
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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Your stack
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