CVE-2025-38386: ACPICA: Refuse to evaluate a method if arguments are missing

Severity: medium (CVSS 5.5 v3.1)
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: 2025-07-25 · updated 2026-10-15
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: ACPICA: Refuse to evaluate a method if arguments are missing As reported in [1], a platform firmware update that increased the number of method parameters and forgot to update a least one of its callers, caused ACPICA to crash due to use-after-free. Since this a result of a clear AML issue that arguably cannot be fixed up by the interpreter (it cannot produce missing data out of thin air), address it by making ACPICA refuse to evaluate a method if the caller attempts to pass fewer arguments than expected to it.

Affected products

Debian Linux: 11.0
Linux kernel: before 5.4.296; from 5.5 before 5.10.240; from 5.11 before 5.15.187; from 5.16 before 6.1.144; from 6.2 before 6.6.97; from 6.7 before 6.12.37 — fixed in 5.10.240, 5.15.187, 5.4.296, 6.1.144, 6.12.37, 6.15.6

How to fix

Upgrade to a fixed version: Linux kernel 5.10.240, 5.15.187, 5.4.296, 6.1.144. Check the vendor advisory for mitigations.

References

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