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CVE-2026-89438

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

N/A
Published: September 11, 2026 at 07:43 PM UTC
Updated: October 19, 2026 at 09:17 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
N/A
Exploit prediction
EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
12a7d2cb811dd8a884dea088a2701fcb8d00136e6.4
Vendor states this is fixed in 0d601126c7afda9bb94dfecc8b2c0a16f20d76cb (fixed)
Vendor states this is fixed in 124e2dbabe460c2a6e7440f4ad8af560131295c9 (fixed)
Vendor states this is fixed in 5b032e1dda486ca41d10536bd195bd8a559af1e2 (fixed)
Vendor states this is fixed in 82d4afadb02fb4d7d7bb9230900904c10e49ec87 (fixed)
Vendor states this is fixed in c9ee2770eb95ba316a56d776b2b66666b70c194b (fixed)
Vendor states this is fixed in 6.12.109 (unaffected)
Vendor states this is fixed in 6.18.50 (unaffected)
Vendor states this is fixed in 6.4 (unaffected)
Vendor states this is fixed in 6.6.157 (unaffected)
Vendor states this is fixed in 7.2.4 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

Source: cverecord
https://git.kernel.org/stable/c/c9ee2770eb95ba316a56d776b2b66666b70c194b
Source: cverecord
https://git.kernel.org/stable/c/5b032e1dda486ca41d10536bd195bd8a559af1e2
Source: cverecord
https://git.kernel.org/stable/c/82d4afadb02fb4d7d7bb9230900904c10e49ec87
Source: cverecord
https://git.kernel.org/stable/c/124e2dbabe460c2a6e7440f4ad8af560131295c9
Source: cverecord
https://git.kernel.org/stable/c/0d601126c7afda9bb94dfecc8b2c0a16f20d76cb

Quick Info

StatusRECEIVED

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