What’s Vulnerable › Vulnerabilities

CVE-2022-49881: wifi: cfg80211: fix memory leak in query_regdb_file()

• 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: 2025-05-01 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: fix memory leak in query_regdb_file() In the function query_regdb_file() the alpha2 parameter is duplicated using kmemdup() and subsequently freed in regdb_fw_cb(). However, request_firmware_nowait() can fail without calling regdb_fw_cb() and thus leak memory.

Affected products

• Linux kernel: from 4.15 before 4.19.267; from 4.20 before 5.4.225; from 5.5 before 5.10.155; from 5.11 before 5.15.79; from 5.16 before 6.0.9; 6.1-rc1, 6.1-rc2, 6.1-rc3, 6.1-rc4 — fixed in 4.19.267, 5.10.155, 5.15.79, 5.4.225, 6.0.9

How to fix

Upgrade to a fixed version: Linux kernel 4.19.267, 5.10.155, 5.15.79, 5.4.225. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0ede1a988299e95d54bd89551fd635980572e920
• https://git.kernel.org/stable/c/219446396786330937bcd382a7bc4ccd767383bc
• https://git.kernel.org/stable/c/38c9fa2cc6bf4b6e1a74057aef8b5cffd23d3264
• https://git.kernel.org/stable/c/57b962e627ec0ae53d4d16d7bd1033e27e67677a
• https://git.kernel.org/stable/c/e1e12180321f416d83444f2cdc9259e0f5093d35
• https://git.kernel.org/stable/c/e9b5a4566d5bc71cc901be50d1fa24da00613120

Get alerted when CVE-2022-49881 or the next vulnerability affects your stack