CVE-2026-45893

Analyzed Analyzed - Analysis Complete

AppArmor Kernel Unaligned Memory Access Fix

Publication date: 2026-05-27

Last updated on: 2026-06-25

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]

CVSS Scores

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Meta Information

Published

2026-05-27

Last Modified

2026-06-25

Generated

2026-07-06

AI Q&A

2026-05-27

EPSS Evaluated

2026-07-05

NVD

CVE-2026-45893

EUVD

EUVD-2026-32359

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 6.13 (inc) to 6.18.14 (exc)
linux	linux_kernel	From 6.19 (inc) to 6.19.4 (exc)
linux	linux_kernel	From 4.11 (inc) to 6.12.75 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

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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