What’s Vulnerable › Vulnerabilities

CVE-2022-50165: wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()`

• 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: 2025-06-18 · updated 2026-06-17
• Weakness: CWE-908

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()` Commit 7a4836560a61 changes simple_write_to_buffer() with memdup_user() but it forgets to change the value to be returned that came from simple_write_to_buffer() call. It results in the following warning: warning: variable 'rc' is uninitialized when used here [-Wuninitialized] return rc; ^~ Remove rc variable and just return the passed in length if the memdup_user() succeeds.

Affected products

• Linux kernel: from 3.17 before 4.14.291; from 4.15 before 4.19.256; from 4.20 before 5.4.211; from 5.5 before 5.10.137; from 5.11 before 5.15.61; from 5.16 before 5.18.18 — fixed in 4.14.291, 4.19.256, 5.10.137, 5.15.61, 5.18.18, 5.19.2

How to fix

Upgrade to a fixed version: Linux kernel 4.14.291, 4.19.256, 5.10.137, 5.15.61. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/409bd72e544fdf4809ea0dac337bb5a1f11a25a9
• https://git.kernel.org/stable/c/52b11a48cf073e0aab923ae809a765d756cecf13
• https://git.kernel.org/stable/c/689e5caf63e99e15d2f485ec297c1bf9243e0e28
• https://git.kernel.org/stable/c/6c5fee83bdbeffe8d607d1ab125122a75f40bd1a
• https://git.kernel.org/stable/c/b13c84e877d7a3095bacb14665db304b2c00e95f
• https://git.kernel.org/stable/c/c9fde3a44da566d8929070ab6bda4f0dfa9955d0
• https://git.kernel.org/stable/c/d4742c886043b69d2d058bfde3998ef333b66595
• https://git.kernel.org/stable/c/d578e0af3a003736f6c440188b156483d451b329

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