CVE-2026-45893
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AppArmor Kernel Unaligned Memory Access Fix

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix & Optimize table creation from possibly unaligned memory Source blob may come from userspace and might be unaligned. Try to optize the copying process by avoiding unaligned memory accesses. - Added Fixes tag - Added "Fix &" to description as this doesn't just optimize but fixes a potential unaligned memory access [jj: remove duplicate word "convert" in comment trigger checkpatch warning]
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Meta Information
Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-45893
EUVD
EUVD-2026-32359
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
apparmor apparmor *
linux_kernel apparmor *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's AppArmor component where the process of creating tables from memory that may not be properly aligned can cause issues.

Specifically, the source data used to create these tables may come from userspace and might be unaligned in memory, which can lead to potential problems during copying.

The fix involves correcting and optimizing the copying process to avoid unaligned memory accesses, thereby preventing possible faults or errors.

Impact Analysis

This vulnerability involves a potential unaligned memory access in the Linux kernel's AppArmor component when creating tables from possibly unaligned memory originating from userspace.

If exploited, it could lead to instability or crashes in the kernel due to improper handling of unaligned memory accesses.

The fix optimizes and corrects this behavior to prevent such issues.

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