CVE-2026-89914

Summary

This vulnerability in the Linux kernel's KVM arm64 implementation allows for potential privilege escalation by failing to sign-extend virtual addresses during range-based TLBI invalidation, which could lead to unauthorized memory access.

Exploitability

Exploiting this flaw requires specific conditions and knowledge of the system architecture, making it moderately difficult but not impossible.

Blast radius

If exploited, the impact is critical as it could allow an attacker with KVM privileges to gain higher-level kernel permissions, leading to potential full system compromise.

Prioritized remediation

Update to a patched version of the Linux kernel that addresses this vulnerability.

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.