CVE-2026-68168
Received Received - Intake

afs: Directory Block Handling Flaw in Linux Kernel

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: afs: Fix afs_edit_dir_remove() to get, not find, block 0 Fix afs_edit_dir_remove() to use afs_dir_get_block() to get block 0 rather than afs_dir_find_block() as the latter caches the found block in the afs_dir_iter and may[*] switch out the page it's on if another afs_dir_find_block() is done. This parallels what afs_edit_dir_add() does. [*] There's more than one block per page.

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-68168
EUVD
EUVD-2026-55554

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves a flaw in the afs_edit_dir_remove() function. It incorrectly uses afs_dir_find_block() to locate block 0 instead of afs_dir_get_block(). The issue arises because afs_dir_find_block() caches the found block in afs_dir_iter and may switch pages if another afs_dir_find_block() call occurs, leading to potential data corruption or incorrect directory removal operations.

Impact Analysis

This vulnerability could lead to filesystem corruption or data loss in AFS (Andrew File System) directories. If exploited, it may cause incorrect file or directory removal, potentially disrupting operations that rely on AFS for storage or sharing.

Mitigation Strategies

Update your Linux kernel to the latest patched version to resolve this vulnerability. Check your distribution's security advisories for the specific kernel version that includes the fix for afs_edit_dir_remove().

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