Unrated severityNVD Advisory· Published Sep 11, 2026· Updated Oct 19, 2026

CVE-2026-89438

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Linux/Kernelllm-fuzzy
osv-coords2 versions
pkg:linux/kernel pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweed
>= 6.4.0, < 6.6.157+ 1 more
- (no CPE)range: >= 6.4.0, < 6.6.157
- (no CPE)range: < 7.2.6-1.1

Patches

Vulnerability mechanics

References

git.kernel.org/stable/c/0d601126c7afda9bb94dfecc8b2c0a16f20d76cbnvd
git.kernel.org/stable/c/124e2dbabe460c2a6e7440f4ad8af560131295c9nvd
git.kernel.org/stable/c/5b032e1dda486ca41d10536bd195bd8a559af1e2nvd
git.kernel.org/stable/c/82d4afadb02fb4d7d7bb9230900904c10e49ec87nvd
git.kernel.org/stable/c/c9ee2770eb95ba316a56d776b2b66666b70c194bnvd

News mentions

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epss	0.000
exploit	0.000
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patch	-0.070
ransomware	0.000