Unspecified impact via use of unopened file
Published Sep 11, 2026 · Updated Sep 11, 2026
Improper file-state validation in the Linux kernel 7.0 allows attackers to cause unspecified impact via unspecified vectors. In nfsd_file_do_acquire(), dentry_create() can return success after an atomic_open handler calls finish_no_open(), but nfsd uses the returned file without first checking FMODE_OPENED. The path requires the rare case in which an atomic_open handler declines to open a newly created file; the published record does not identify a resulting security impact.
Summary
What happened
Improper file-state validation in the Linux kernel 7.0 allows attackers to cause unspecified impact via unspecified vectors. In nfsd_file_do_acquire(), dentry_create() can return success after an atomic_open handler calls finish_no_open(), but nfsd uses the returned file without first checking FMODE_OPENED. The path requires the rare case in which an atomic_open handler declines to open a newly created file; the published record does not identify a resulting security impact.
The record
- CVE
- CVE-2026-89687
- Published
- Sep 11, 2026
- Updated
- Sep 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 11, 2026CVE publishedPublication date reported by the CVE source.
- Sep 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=64a989dbd144e0622371396461b11335459692d2 <5859cc01fee06a2cd7458905a9593082fbab06e1
- Affected versionversion=64a989dbd144e0622371396461b11335459692d2 <a95a1cffacd0203100297001719160160f443dd6
- Affected versionversion=7.0
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
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Public exploit references
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Technologies
Your stack
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Your stack
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