Local service interruption via unbalanced clock locking
Published Nov 8, 2024 · Updated May 12, 2026
Improper locking in affected Linux kernel releases allows local users to interrupt service through an invalid clock-setting request. In pc_clock_settime(), get_clock_desc() takes clk->rwsem and an fd reference before timespec64 validation, but the invalid-time error path releases neither resource. Low-privileged local access is required, and the retained lock and fd-related resources affect availability without reported confidentiality or integrity impact.
Summary
What happened
Improper locking in affected Linux kernel releases allows local users to interrupt service through an invalid clock-setting request. In pc_clock_settime(), get_clock_desc() takes clk->rwsem and an fd reference before timespec64 validation, but the invalid-time error path releases neither resource. Low-privileged local access is required, and the retained lock and fd-related resources affect availability without reported confidentiality or integrity impact.
The record
- CVE
- CVE-2024-50210
- Published
- Nov 8, 2024
- Updated
- May 12, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- CWE-667, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 8, 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?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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