Local service interruption via leaked sysfs references
Published May 1, 2024 · Updated May 23, 2026
Resource leak in Linux sysfs allows local users to interrupt affected Linux-based systems by triggering a failed kernfs lookup. In sysfs_break_active_protection(), kernfs_find_and_get() can return NULL after the routine acquires a kobject reference, and the error path fails to release that reference. Low-privileged local access and repeated reachability of this error path are required; accumulated references can exhaust kernel resources and interrupt service.
Summary
What happened
Resource leak in Linux sysfs allows local users to interrupt affected Linux-based systems by triggering a failed kernfs lookup. In sysfs_break_active_protection(), kernfs_find_and_get() can return NULL after the routine acquires a kobject reference, and the error path fails to release that reference. Low-privileged local access and repeated reachability of this error path are required; accumulated references can exhaust kernel resources and interrupt service.
The record
- CVE
- CVE-2024-26993
- Published
- May 1, 2024
- Updated
- May 23, 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
- May 1, 2024CVE publishedPublication date reported by the CVE source.
- May 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
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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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