Local AFS data corruption via cached page switch
Published Aug 10, 2026 · Updated Aug 10, 2026
A directory-editing flaw in Linux kernel 6.14 and affected later branches allows local users to corrupt AFS directory data. afs_edit_dir_remove() obtains block 0 with afs_dir_find_block(), whose iterator cache can switch to another page during a later lookup and leave the metadata reference tied to the wrong page. Exploitation requires local access to a mounted kAFS filesystem and a removal path that performs another block lookup on a page containing multiple directory blocks.
Summary
What happened
A directory-editing flaw in Linux kernel 6.14 and affected later branches allows local users to corrupt AFS directory data. afs_edit_dir_remove() obtains block 0 with afs_dir_find_block(), whose iterator cache can switch to another page during a later lookup and leave the metadata reference tied to the wrong page. Exploitation requires local access to a mounted kAFS filesystem and a removal path that performs another block lookup on a page containing multiple directory blocks.
The record
- CVE
- CVE-2026-68168
- Published
- Aug 10, 2026
- Updated
- Aug 10, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1565.001
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 10, 2026CVE publishedPublication date reported by the CVE source.
- Aug 10, 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?
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- Affected versionversion=6.14
- Affected versionversion=a5b5beebcf96d5e8a2fc79856c2ac1e93f82478e <62d9853aa4ce6e9797b6949804891be14b219752
- Affected versionversion=a5b5beebcf96d5e8a2fc79856c2ac1e93f82478e <bfdfc7782ada6f3a4df7182889b66039f8e4131c
- Affected versionversion=a5b5beebcf96d5e8a2fc79856c2ac1e93f82478e <f2b293359924117736218701ebd8b40618d73e6f
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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