{"id":"CVE-2026-89911","published":"2026-09-16T11:17:00.127","lastModified":"2026-09-16T15:18:17.300","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Correctly cap TLBI Range to the architural limit\n\nTLB Invalidation by Range has a fairly powerful way of encoding pretty\nlarge ranges in a small number of bits. This range can be based on an\narbitrary VA, which means it is pretty easy for a guest to generate an\noverflow should the hypervisor be naive enough to add the range to the\nbase...\n\nMake sure the range is capped to the limit dictated by the address bit\nthat determines the VA range. For an IPA invalidation, this is further\ncorrected down the line to ignore the upper range.","cvssScore":7.9,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/2de38f0448b45d27eba984fc0d9edb7a138972c2","tags":[]},{"url":"https://git.kernel.org/stable/c/566b1f08d983615f731cc693f2ad59db302c6b57","tags":[]},{"url":"https://git.kernel.org/stable/c/69a598288195947a1662b53de702eb6976af96b7","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This vulnerability allows a guest operating system to potentially overflow a TLB invalidation range, leading to a potential privilege escalation or denial of service condition.","exploitability":"Exploiting this vulnerability requires a guest OS with the ability to generate a large TLB invalidation range, making it moderately difficult. The hypervisor must be naive enough to accept the range without proper validation.","blast_radius":"If exploited, the impact could be significant, potentially allowing a guest to escalate privileges or cause a denial of service on the host system.","remediation":"Upgrade to the fixed version 6.1.1 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["privilege-escalation","denial-of-service","hypervisor"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-06T08:46:10.492Z"}}