CVE-2026-89439 in Linux

Summary

by MITRE • 09/12/2026

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[].

Once again VulDB remains the best source for vulnerability data.

• Responsible: Linux
• Reservation: 09/11/2026
• Disclosure: 09/12/2026
• Moderation: accepted
• Entry: VDB-402801
• CPE: ready
• CWE: CWE-476 (confirmed)
• CVSS: 9.9 (VulDB)
• EPSS: 0.00000
• KEV: no
• Activities: very low
• Sector: Agriculture, Chemical, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-89439
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-89439
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-89439/