Local service interruption via NULL file pointer
Published Jan 19, 2025 · Updated May 11, 2026
NULL-pointer dereference in the Linux kernel 6.12 through 6.12.9 allows local users to interrupt service during NFS cache writes. nfs_netfs_init_request() passes a NULL file pointer to nfs_file_open_context() while netfslib creates a copy-to-cache write request, and cleanup also dereferences the absent context. Triggering requires the NFS netfs copy-to-cache path; the resulting kernel oops interrupts availability without reported data disclosure or modification.
Summary
What happened
NULL-pointer dereference in the Linux kernel 6.12 through 6.12.9 allows local users to interrupt service during NFS cache writes. nfs_netfs_init_request() passes a NULL file pointer to nfs_file_open_context() while netfslib creates a copy-to-cache write request, and cleanup also dereferences the absent context. Triggering requires the NFS netfs copy-to-cache path; the resulting kernel oops interrupts availability without reported data disclosure or modification.
The record
- CVE
- CVE-2024-57927
- Published
- Jan 19, 2025
- Updated
- May 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-476, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 19, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.12
- Affected versionversion=ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <13a07cc81e2d116cece727a83746c74b87a9d417
- Affected versionversion=ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <86ad1a58f6a9453f49e06ef957a40a8dac00a13f
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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Public exploit references
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Technologies
Your stack
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Your stack
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