CVE-2026-89438

CVE CVE-2026-89438EUVD EUVD-2026-76344Published 2026-09-11T19:43:08.000ZLast changed 2026-09-14T11:59:50.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.3-rc1; patch: 7.2.4; patch: 0; patch: 6.6.157; patch: 6.18.50; 6.4; 12a7d2cb811dd8a884dea088a2701fcb8d00136e <c9ee2770eb95ba316a56d776b2b66666b70c194b; 12a7d2cb811dd8a884dea088a2701fcb8d00136e <0d601126c7afda9bb94dfecc8b2c0a16f20d76cb; patch: 6.12.109; 12a7d2cb811dd8a884dea088a2701fcb8d00136e <5b032e1dda486ca41d10536bd195bd8a559af1e2; 12a7d2cb811dd8a884dea088a2701fcb8d00136e <82d4afadb02fb4d7d7bb9230900904c10e49ec87; 12a7d2cb811dd8a884dea088a2701fcb8d00136e <124e2dbabe460c2a6e7440f4ad8af560131295c9

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.