Service interruption via mismatched xfrm address families
Published Nov 7, 2024 · Updated May 12, 2026
Improper input validation in Linux kernel xfrm allows local users to interrupt service by creating a crafted security association. The verify_newsa_info function skips prefix-length bounds when the selector family is AF_UNSPEC, before copy_from_user_state replaces it with AF_INET. Low-privilege local access is required; the published assessment limits the consequence to availability loss.
Summary
What happened
Improper input validation in Linux kernel xfrm allows local users to interrupt service by creating a crafted security association. The verify_newsa_info function skips prefix-length bounds when the selector family is AF_UNSPEC, before copy_from_user_state replaces it with AF_INET. Low-privilege local access is required; the published assessment limits the consequence to availability loss.
The record
- CVE
- CVE-2024-50142
- Published
- Nov 7, 2024
- Updated
- May 12, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- CWE-20, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 7, 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 <*
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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