Local memory leaks via AFS symlink races
Published Jul 19, 2026 · Updated Jul 19, 2026
Race condition in AFS symlink handling in Linux Kernel 6.14 through 7.0.10 allows local users to leak memory through concurrent reads. The afs_get_link path calls afs_read_single without validate_lock and dereferences symlink buffer pointers during RCU pathwalk without RCU barriers. An AFS filesystem and competing get_link operations are required; the upstream record documents leaked allocations, not code execution.
Summary
What happened
Race condition in AFS symlink handling in Linux Kernel 6.14 through 7.0.10 allows local users to leak memory through concurrent reads. The afs_get_link path calls afs_read_single without validate_lock and dereferences symlink buffer pointers during RCU pathwalk without RCU barriers. An AFS filesystem and competing get_link operations are required; the upstream record documents leaked allocations, not code execution.
The record
- CVE
- CVE-2026-64057
- Published
- Jul 19, 2026
- Updated
- Jul 19, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1499.001
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 19, 2026CVE publishedPublication date reported by the CVE source.
- Jul 19, 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=eae9e78951bb02a7b94a9adef6e981413d13c564 <77ea917cbed62882a33114b1e23ededb977e4287
- Affected versionversion=eae9e78951bb02a7b94a9adef6e981413d13c564 <c0410adf3da6db46f3513411fcf95e63c2f1d1ad
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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