System crash via repeated battery hook unregistration
Published Oct 21, 2024 · Updated May 12, 2026
Use-after-release in affected Linux kernel versions beginning with 4.17 allows local users to crash the system through an ACPI battery-hook error. When hook registration fails for a new battery, the kernel removes the hook but leaves the provider unaware, so a later battery_hook_unregister() call reuses the released registration. Exploitation requires local low-privileged access and the error path; the resulting failure interrupts the Linux host or affected Siemens appliance.
Summary
What happened
Use-after-release in affected Linux kernel versions beginning with 4.17 allows local users to crash the system through an ACPI battery-hook error. When hook registration fails for a new battery, the kernel removes the hook but leaves the provider unaware, so a later battery_hook_unregister() call reuses the released registration. Exploitation requires local low-privileged access and the error path; the resulting failure interrupts the Linux host or affected Siemens appliance.
The record
- CVE
- CVE-2024-49955
- Published
- Oct 21, 2024
- Updated
- May 12, 2026
- Vendor
- Siemens
- Product
- SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family
- Classifications
- CWE-672, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 21, 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 <V3.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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