CVE-2025-63913

Publication date 27 July 2026

Last updated 30 September 2026

Ubuntu priority

Cvss 3 Severity Score

Description

An issue was discovered in OpenSBI 1.3 allowing attackers to cause a denial of service via crafted request to the SBI function #2 or the 'Find and configure a matching counter' function of SBI PMU extension.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
opensbi	26.04 LTS resolute	Fixed 1.8.1
	24.04 LTS noble	Fixed 1.7
	22.04 LTS jammy	Vulnerable, work in progress
	20.04 LTS focal	Not affected

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	None
Availability impact	High

Scores

Parameter	Value
Base score	7.5 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-8853-1
OpenSBI vulnerability
30 September 2026