Bug 2532236 (CVE-2026-89438) - CVE-2026-89438 kernel: platform/x86: ISST: Validate logical CPU id and clos id
Summary: CVE-2026-89438 kernel: platform/x86: ISST: Validate logical CPU id and clos id
Keywords:
Status: NEW
Alias: CVE-2026-89438
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-11 21:35 UTC by OSIDB Bzimport
Modified: 2026-09-14 21:27 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-09-11 21:35:54 UTC 
In the Linux kernel, the following vulnerability has been resolved:

platform/x86: ISST: Validate logical CPU id and clos id

Validate max CLOS ID and logical CPU ID for core power feature.
Reject any clos level or logical CPU number greater than the
supported maximum. These are used to calculate MMIO offset.
Comment 1 Keith Grant 2026-09-14 21:24:25 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89438.mbox
Note You need to log in before you can comment on or make changes to this bug.