Local system hang via NMI lock recursion
Published Jan 11, 2025 · Updated May 11, 2026
Deadlock in Linux kernel 6.8 through 6.12.4 allows local users to hang the system by triggering an NMI during stack trace storage. The stack_depot_save_flags() path attempts to acquire pool_lock in NMI context even when that lock is already held, rather than using a nonblocking trylock. An attacker must locally cause the narrow NMI timing condition; successful exploitation stops kernel progress but does not disclose or modify data.
Summary
What happened
Deadlock in Linux kernel 6.8 through 6.12.4 allows local users to hang the system by triggering an NMI during stack trace storage. The stack_depot_save_flags() path attempts to acquire pool_lock in NMI context even when that lock is already held, rather than using a nonblocking trylock. An attacker must locally cause the narrow NMI timing condition; successful exploitation stops kernel progress but does not disclose or modify data.
The record
- CVE
- CVE-2024-48876
- Published
- Jan 11, 2025
- Updated
- May 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-667, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 11, 2025CVE publishedPublication date reported by the CVE source.
- May 11, 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=4434a56ec20925333d6cf4d4093641d063abd35b <031e04bdc834cda3b054ef6b698503b2b97e8186
- Affected versionversion=4434a56ec20925333d6cf4d4093641d063abd35b <9bfeeeff2c92b9dd261198b601b45bde4c529841
- Affected versionversion=6.8
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
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Technologies
Your stack
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Your stack
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