SB20260912300 - Untrusted Pointer Dereference in Linux kernel openrisc kernel
Published: September 12, 2026
Security Bulletin ID
SB20260912300
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Untrusted Pointer Dereference (CVE-ID: CVE-2026-89489)
CWE-ID: CWE-822 - Untrusted Pointer Dereference
CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to execute arbitrary code in kernel context.
The vulnerability exists due to improper validation of user pointers in the sys_or1k_atomic syscall when processing syscall arguments. A local user can supply kernel addresses as syscall pointers to execute arbitrary code in kernel context.
Remediation
Install update from vendor's website.