HIGH 7.1 Microsoft

CVE-2026-64227

ACPI: driver: Check ACPI_COMPANION() against NULL during probe

Microsoft Security Update 2026-Jul: ACPI: driver: Check ACPI_COMPANION() against NULL during probe

Affected Products

azl3 kernel 6.6.144.1-1 on Azure Linux 3.0

Remediation

$ sudo apt install --only-upgrade linux

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64227
https://nvd.nist.gov/vuln/detail/CVE-2026-64227

Published: 2026-07-14 · Source: Microsoft · Feed updated: 2026-08-04

This high severity vulnerability with a CVSS score of 7.1 was published on 2026-07-14 via Microsoft. A remediation command is available below. Affected: azl3 kernel 6.6.144.1-1 on Azure Linux 3.0.

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