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CVE-2022-50462: MIPS: vpe-mt: fix possible memory leak while module exiting

• 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: 2025-10-01 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: MIPS: vpe-mt: fix possible memory leak while module exiting Afer commit 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array"), the name of device is allocated dynamically, it need be freed when module exiting, call put_device() to give up reference, so that it can be freed in kobject_cleanup() when the refcount hit to 0. The vpe_device is static, so remove kfree() from vpe_device_release().

Affected products

• Linux kernel: from 2.6.30 before 4.9.337; from 4.10 before 4.14.303; from 4.15 before 4.19.270; from 4.20 before 5.4.229; from 5.5 before 5.10.163; from 5.11 before 5.15.86 — fixed in 4.14.303, 4.19.270, 4.9.337, 5.10.163, 5.15.86, 5.4.229

How to fix

Upgrade to a fixed version: Linux kernel 4.14.303, 4.19.270, 4.9.337, 5.10.163. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/170e9913c2ed5cfc37c0adf0fdbd368d2d8d8168
• https://git.kernel.org/stable/c/48d42f4464d713fbdd79f334fdcd6e5be534cc67
• https://git.kernel.org/stable/c/5822e8cc84ee37338ab0bdc3124f6eec04dc232d
• https://git.kernel.org/stable/c/851ae5640875f06494e40002cd503b11a634c6fb
• https://git.kernel.org/stable/c/9d180e0bb21c57bd6cca2adeb672d3b522e910b5
• https://git.kernel.org/stable/c/ab3d47c1fd0202821abd473ca87580faafd47847
• https://git.kernel.org/stable/c/b191dde84e40624d5577f64db0ec922c5c0ec57c
• https://git.kernel.org/stable/c/b3325a443525e3b89151879b834519b21c5e3011
• https://git.kernel.org/stable/c/e820a8192ff68570100347855b567512aec43819

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