In the Linux kernel, the following vulnerability has been resolved:

platform/x86: ISST: Add a NULL check for sst_inst[]

To be consistent with other places, add a NULL check for failed socket
loading by checking isst_common.sst_inst[].

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
d805456c712f93ba8a012430f2a93bec133b6ff4 affected < 49a95fe1f64f41c2e8959e525aefdb10f23b293e
d805456c712f93ba8a012430f2a93bec133b6ff4 affected < c280fcd53b938b70c7dee9ce1a66b32bd6e5ebaa
d805456c712f93ba8a012430f2a93bec133b6ff4 affected < ef7975af15126dd70ace519da7bb33f2848b9064
d805456c712f93ba8a012430f2a93bec133b6ff4 affected < 3de2776e9d7073765c10c2326c2bda5926811ea6
Linux Linux affected
Version Status Constraints
6.4 affected —
0 unaffected < 6.4
6.12.109 unaffected ≤ 6.12.*
6.18.50 unaffected ≤ 6.18.*
7.2.4 unaffected ≤ 7.2.*
7.3-rc1 unaffected ≤ *

No data.

No data.

No data.

Project Subscriptions

Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/3de2776e9d7073765c10c2326c2bda5926811ea6 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/49a95fe1f64f41c2e8959e525aefdb10f23b293e cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/c280fcd53b938b70c7dee9ce1a66b32bd6e5ebaa cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/ef7975af15126dd70ace519da7bb33f2848b9064 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-89439 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-89439 cve-icon
History

Sat, 12 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476
References
Metrics threat_severity

None

 cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: platform/x86: ISST: Add a NULL check for sst_inst[] To be consistent with other places, add a NULL check for failed socket loading by checking isst_common.sst_inst[].
Title platform/x86: ISST: Add a NULL check for sst_inst[]
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-11T19:43:08.745Z

Reserved: 2026-09-11T19:38:34.703Z

Link: CVE-2026-89439

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-11T20:19:24.203

Modified: 2026-09-11T20:19:24.203

Link: CVE-2026-89439

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-11T19:43:08Z

Links: CVE-2026-89439 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses