Integer underflow in Linux kernel - CVE-2026-45884
Published: May 28, 2026
Vulnerability identifier: #VU132602
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-2026-45884
CWE-ID: CWE-191
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an integer underflow in aa_get_buffer() when pulling buffers from the per-cpu list. A local user can trigger repeated buffer operations to cause a denial of service.
The issue can starve other CPUs of cached buffers and force repeated kmalloc(aa_g_path_max) allocations.
How to mitigate CVE-2026-45884
Install security update from vendor's repository.