SB20260816537 - Improper access control in Linux kernel include asm
Published: August 16, 2026
Security Bulletin ID
SB20260816537
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) Improper access control (CVE-ID: CVE-2026-68473)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 6.8 [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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper access control in mask_user_address() in arch/powerpc/include/asm/uaccess.h when handling user-supplied addresses on E500 hardware. A local user can supply a crafted user address to cause a denial of service.
Only PowerPC E500 systems are affected.
Remediation
Install update from vendor's website.