Local stale-memory disclosure via premature folio unlock
Published Feb 14, 2026 · Updated Feb 14, 2026
Out-of-bounds read in Linux Kernel 6.14 through 6.18.5 allows local users to disclose stale memory through mmap on a netfs mount. netfs_read_unlock_folios treats EOF as the collection boundary and unlocks the folio before the ZERO subrequest clears its post-EOF tail. An ordinary unprivileged user needs read access to an unaligned file on an existing affected mount; 9P makes the race deterministic, exposing stale kernel, page-cache, or prior-process data.
Summary
What happened
Out-of-bounds read in Linux Kernel 6.14 through 6.18.5 allows local users to disclose stale memory through mmap on a netfs mount. netfs_read_unlock_folios treats EOF as the collection boundary and unlocks the folio before the ZERO subrequest clears its post-EOF tail. An ordinary unprivileged user needs read access to an unaligned file on an existing affected mount; 9P makes the race deterministic, exposing stale kernel, page-cache, or prior-process data.
The record
- CVE
- CVE-2025-71201
- Published
- Feb 14, 2026
- Updated
- Feb 14, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-125, T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 14, 2026CVE publishedPublication date reported by the CVE source.
- Feb 14, 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=6.14
- Affected versionversion=e2d46f2ec332533816417b60933954173f602121 <570ad253a3455a520f03c2136af8714bc780186d
- Affected versionversion=e2d46f2ec332533816417b60933954173f602121 <5b5482c0e5ee740b35a70759d3582477aea8e8e4
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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