CVE-2022-49608: pinctrl: ralink: Check for null return of devm_kcalloc

Severity: medium (CVSS 5.5 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: 2025-02-26 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: pinctrl: ralink: Check for null return of devm_kcalloc Because of the possible failure of the allocation, data->domains might be NULL pointer and will cause the dereference of the NULL pointer later. Therefore, it might be better to check it and directly return -ENOMEM without releasing data manually if fails, because the comment of the devm_kmalloc() says "Memory allocated with this function is automatically freed on driver detach.".

Affected products

Linux kernel: from 4.18 before 4.19.254; from 4.20 before 5.4.208; from 5.5 before 5.10.134; from 5.11 before 5.15.58; from 5.16 before 5.18.15; 5.19-rc1, 5.19-rc2, 5.19-rc3, 5.19-rc4, 5.19-rc5, 5.19-rc6 (+1) — fixed in 4.19.254, 5.10.134, 5.15.58, 5.18.15, 5.4.208

How to fix

Upgrade to a fixed version: Linux kernel 4.19.254, 5.10.134, 5.15.58, 5.18.15. Check the vendor advisory for mitigations.

References

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