What’s Vulnerable › Vulnerabilities

CVE-2026-89439: platform/x86: ISST: Add a NULL check for sst_inst[]

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-10-21

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[].

Affected products

• Linux kernel: 6.4 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3de2776e9d7073765c10c2326c2bda5926811ea6
• https://git.kernel.org/stable/c/49a95fe1f64f41c2e8959e525aefdb10f23b293e
• https://git.kernel.org/stable/c/c280fcd53b938b70c7dee9ce1a66b32bd6e5ebaa
• https://git.kernel.org/stable/c/ef7975af15126dd70ace519da7bb33f2848b9064
• https://git.kernel.org/stable/c/f7c9370dd1d3cedb80c635528271cab1d0bcb103

Get alerted when CVE-2026-89439 or the next vulnerability affects your stack