SB20260528190 - Integer underflow in Linux kernel apparmor
Published: May 28, 2026
Security Bulletin ID
SB20260528190
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer underflow (CVE-ID: CVE-2026-45884)
CWE-ID: CWE-191 - Integer underflow
CVSSv4: 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
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.
Remediation
Install update from vendor's website.