Improper input validation in Linux kernel - CVE-2026-45893

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Main Vulnerability Database Vulnerabilities #VU132595

Improper input validation in Linux kernel - CVE-2026-45893

Published: May 28, 2026


Vulnerability identifier: #VU132595
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45893
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability: No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel

Detailed vulnerability description

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of unaligned memory access in AppArmor table creation when processing user-supplied source blobs. A local user can provide a specially crafted unaligned blob to cause a denial of service.

The source blob may originate from userspace.


How to mitigate CVE-2026-45893

Install security update from vendor's repository.

Sources