FUSE page writeback failure via write-close race
Published Jun 18, 2025 · Updated May 11, 2026
Race condition in Linux kernel 5.16 through 5.18.17 and 5.19 through 5.19.1 allows local users to prevent FUSE page writeback. A write-versus-close race can dirty pages after fuse_flush calls write_inode_now, while fuse_release fails to write the remaining dirty pages before releasing the last writable file. Exploitation requires local access to a FUSE-mounted file and control of concurrent write and close operations; the documented consequence is incomplete writeback.
Summary
What happened
Race condition in Linux kernel 5.16 through 5.18.17 and 5.19 through 5.19.1 allows local users to prevent FUSE page writeback. A write-versus-close race can dirty pages after fuse_flush calls write_inode_now, while fuse_release fails to write the remaining dirty pages before releasing the last writable file. Exploitation requires local access to a FUSE-mounted file and control of concurrent write and close operations; the documented consequence is incomplete writeback.
The record
- CVE
- CVE-2022-50217
- Published
- Jun 18, 2025
- Updated
- May 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 18, 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=36ea23374d1f7b6a9d96a2b61d38830fdf23e45d <035ff33cf4db101250fb980a3941bf078f37a544
- Affected versionversion=36ea23374d1f7b6a9d96a2b61d38830fdf23e45d <4bd9d5d20f344d015422969302d12653c903c271
- Affected versionversion=36ea23374d1f7b6a9d96a2b61d38830fdf23e45d <5ccb0420b7c9334ab8122037847101931b899301
- Affected versionversion=5.16
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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