MEDIUM 5.5 Microsoft

CVE-2026-31486

hwmon: (pmbus/core) Protect regulator operations with mutex

Microsoft Security Update 2026-Apr: hwmon: (pmbus/core) Protect regulator operations with mutex

Affected Products

azl3 kernel 6.6.134.1-2 on Azure Linux 3.0
azl3 kernel 6.6.138.1-1 on Azure Linux 3.0
azl3 kernel 6.6.130.1-3 on Azure Linux 3.0
cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0
azl3 kernel 6.6.137.1-2 on Azure Linux 3.0
azl3 kernel 6.6.139.1-1 on Azure Linux 3.0
azl3 kernel 6.6.141.1-1 on Azure Linux 3.0
azl3 kernel 6.6.143.1-1 on Azure Linux 3.0

Remediation

$ sudo apt install --only-upgrade linux-kernel

References

Published: 2026-04-14 · Source: Microsoft · Feed updated: 2026-09-19

This medium severity vulnerability with a CVSS score of 5.5 was published on 2026-04-14 via Microsoft. A remediation command is available below. Affected: azl3 kernel 6.6.134.1-2 on Azure Linux 3.0, azl3 kernel 6.6.138.1-1 on Azure Linux 3.0, azl3 kernel 6.6.130.1-3 on Azure Linux 3.0 and 5 more.

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