Memory corruption via undersized assertion buffer
Published Jan 22, 2025 · Updated May 12, 2026
Buffer overflow in GNU C Library 2.13 through 2.40 allows local users to corrupt memory through a failed assertion. The __assert_fail_base function allocates space for the assertion text but omits the abort_msg_s size field, so page-aligned messages overflow the mapping. Exploitation requires a custom setuid program with a user-controlled program name and an existing assertion failure; upstream reports no such program.
Summary
What happened
Buffer overflow in GNU C Library 2.13 through 2.40 allows local users to corrupt memory through a failed assertion. The __assert_fail_base function allocates space for the assertion text but omits the abort_msg_s size field, so page-aligned messages overflow the mapping. Exploitation requires a custom setuid program with a user-controlled program name and an existing assertion failure; upstream reports no such program.
The record
- CVE
- CVE-2025-0395
- Published
- Jan 22, 2025
- Updated
- May 12, 2026
- Vendor
- Siemens
- Product
- RUGGEDCOM ROX RX1500
- Classifications
- CWE-131
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 22, 2025CVE 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 <V2.17.1
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
Public exploit references
- Qualys assertion-failure proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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