Kernel crash via unlocked stashed-dentry dereference
Published Sep 18, 2024 · Updated Aug 5, 2026
Use-after-free in libfs in Linux 6.9 through 6.10.9 allows local users to crash the kernel through a raced stashed-dentry lookup. The get_stashed_dentry() helper reads an RCU-protected location with READ_ONCE() and dereferences it without first holding the RCU read lock, leaving a concurrently freed dentry reachable. Low-privilege local access and successful race timing are required; the grounded consequence is a kernel crash.
Summary
What happened
Use-after-free in libfs in Linux 6.9 through 6.10.9 allows local users to crash the kernel through a raced stashed-dentry lookup. The get_stashed_dentry() helper reads an RCU-protected location with READ_ONCE() and dereferences it without first holding the RCU read lock, leaving a concurrently freed dentry reachable. Low-privilege local access and successful race timing are required; the grounded consequence is a kernel crash.
The record
- CVE
- CVE-2024-46801
- Published
- Sep 18, 2024
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 18, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=07fd7c329839cf0b8c7766883d830a1a0d12d1dd <03e2a1209a83a380df34a72f7d6d1bc6c74132c7
- Affected versionversion=07fd7c329839cf0b8c7766883d830a1a0d12d1dd <4e32c25b58b945f976435bbe51f39b32d714052e
- Affected versionversion=6.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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