{"id":"CVE-2026-89914","published":"2026-09-16T11:17:00.443","lastModified":"2026-09-16T15:18:17.647","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Sign-extend VA for range-based TLBI invalidation\n\nWhen the decode_range_tlbi() helper was moved to be used for S1 TLBIs,\nthe required sign extension was omitted. Add it.\n\nAs a result, special care must be taken to not overflow PA bits when\nthis is used for S2 invalidation.","cvssScore":9.3,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/2393470085649f0b973ecceb26fe8fc71edde0c1","tags":[]},{"url":"https://git.kernel.org/stable/c/3feb83918e30f0472e058224b926ebfe8a064fac","tags":[]},{"url":"https://git.kernel.org/stable/c/72bce82c4171bf330919ff1b64dc0a36c254ec7d","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"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.","remediation":"Update to a patched version of the Linux kernel that addresses this vulnerability.","tags":["kernel","privilege-escalation","arm64","kvm"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-23T08:47:06.496Z"}}