A security notice published on September 30, 2026 reports incorrect index validation in requests to the SBI PMU extension, which could allow denial of service.
Notice USN-8853-1, published on September 30, 2026, says OpenSBI did not correctly validate the counter index mask in requests to the SBI PMU extension. According to the bulletin, an attacker could exploit this issue to cause denial of service. The cited content is an automatic translation of the Ubuntu Security feed.
To consult and verify the issue, look up notice USN-8853-1 in the official Ubuntu Security channel and check the original text, which is the reference for details and any updates. The supplied excerpt does not state affected versions or available fixes. If you use AI to study or apply the material, avoid including internal or identifiable data; follow your organization's policy and check technical recommendations against the official notice.