SB20260916142 - Out-of-bounds write in Linux kernel mm
Published: September 16, 2026
Security Bulletin ID
SB20260916142
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) Out-of-bounds write (CVE-ID: CVE-2026-89967)
CWE-ID: CWE-787 - Out-of-bounds write
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 cause an out-of-bounds write.
The vulnerability exists due to improper bounds checking in migrate_device_range() and migrate_device_pfns() when processing a compound folio that extends beyond a caller-provided PFN array range. A local user can trigger device memory migration with such a compound folio to cause an out-of-bounds write.
Remediation
Install update from vendor's website.