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

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Summary

CVECVE-2026-89438
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:24 UTC
Updated2026-09-11 20:19:24 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 12a7d2cb811dd8a884dea088a2701fcb8d00136e c9ee2770eb95ba316a56d776b2b66666b70c194b git Not specified
CNA Linux Linux affected 12a7d2cb811dd8a884dea088a2701fcb8d00136e 5b032e1dda486ca41d10536bd195bd8a559af1e2 git Not specified
CNA Linux Linux affected 12a7d2cb811dd8a884dea088a2701fcb8d00136e 82d4afadb02fb4d7d7bb9230900904c10e49ec87 git Not specified
CNA Linux Linux affected 12a7d2cb811dd8a884dea088a2701fcb8d00136e 124e2dbabe460c2a6e7440f4ad8af560131295c9 git Not specified
CNA Linux Linux affected 6.4 Not specified
CNA Linux Linux unaffected 6.4 semver Not specified
CNA Linux Linux unaffected 6.12.109 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/124e2dbabe460c2a6e7440f4ad8af560131295c9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c9ee2770eb95ba316a56d776b2b66666b70c194b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5b032e1dda486ca41d10536bd195bd8a559af1e2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/82d4afadb02fb4d7d7bb9230900904c10e49ec87 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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