CANONICALVERIFIED
USN-8853-1: OpenSBI vulnerability
Checked 1 Oct 2026. BlackTree preserves the last verified facts if a later source check is temporarily unavailable.
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UBUNTU SECURITY NOTICECANONICALVERIFIED
PUBLISHER UPDATE · USN-8853-1
USN-8853-1 release notes and known issues
USN-8853-1: OpenSBI vulnerability
Scope: Ubuntu. This update record adds version, fix and known-issue context. Its publication date is not a lifecycle boundary.
Summary
It was discovered that OpenSBI did not properly validate the counter index mask in SBI PMU extension requests. An attacker could use this issue to cause a denial of service.
Improvements and security content
- It was discovered that OpenSBI did not properly validate the counter index mask in SBI PMU extension requests. An attacker could use this issue to cause a denial of service.
Known issues
Publisher statementNot stated. The verified publisher record does not contain a known-issues statement.
Affected products and versions
Products
- Ubuntu
Affected versions
- See the official publisher source for applicability.
Fixed versions or updates
- No fixed version is stated in this record.
Recommended action
Review the official publisher document before deployment.
Lifecycle connections
These links connect the publisher update to related Lifecycle records without treating the update publication date as an end-of-support date.