SB2026091749 - Incorrect Conversion between Numeric Types in Linux kernel arm64 kvm
Published: September 17, 2026
Security Bulletin ID
SB2026091749
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) Incorrect Conversion between Numeric Types (CVE-ID: CVE-2026-89914)
CWE-ID: CWE-681 - Incorrect Conversion between Numeric Types
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 remote attacker to compromise confidentiality, integrity, and availability.
The vulnerability exists due to incorrect sign extension in the decode_range_tlbi() helper when processing range-based TLBI invalidation. A remote attacker can trigger range-based TLBI invalidation to compromise confidentiality, integrity, and availability.
Remediation
Install update from vendor's website.