CVE-2021-47609: firmware: arm_scpi: Fix string overflow in SCPI genpd driver

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-06-19 · updated 2026-06-17
Weakness: CWE-120

Description

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scpi: Fix string overflow in SCPI genpd driver Without the bound checks for scpi_pd->name, it could result in the buffer overflow when copying the SCPI device name from the corresponding device tree node as the name string is set at maximum size of 30. Let us fix it by using devm_kasprintf so that the string buffer is allocated dynamically.

Affected products

Linux kernel: from 4.8 before 4.9.294; from 4.10 before 4.14.259; from 4.15 before 4.19.222; from 4.20 before 5.4.168; from 5.5 before 5.10.88; from 5.11 before 5.15.11 — fixed in 4.14.259, 4.19.222, 4.9.294, 5.10.88, 5.15.11, 5.4.168

How to fix

Upgrade to a fixed version: Linux kernel 4.14.259, 4.19.222, 4.9.294, 5.10.88. Check the vendor advisory for mitigations.

References

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