CVE-2022-49881: wifi: cfg80211: fix memory leak in query_regdb_file()
First published: Thu May 01 2025(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=4.15<4.19.267 | |
| Linux Kernel | >=4.20<5.4.225 | |
| Linux Kernel | >=5.5<5.10.155 | |
| Linux Kernel | >=5.11<5.15.79 | |
| Linux Kernel | >=5.16<6.0.9 | |
| Linux Kernel | =6.1-rc1 | |
| Linux Kernel | =6.1-rc2 | |
| Linux Kernel | =6.1-rc3 | |
| Linux Kernel | =6.1-rc4 |
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Reference Links
- https://git.kernel.org/stable/c/219446396786330937bcd382a7bc4ccd767383bc
- https://git.kernel.org/stable/c/0ede1a988299e95d54bd89551fd635980572e920
- https://git.kernel.org/stable/c/e1e12180321f416d83444f2cdc9259e0f5093d35
- https://git.kernel.org/stable/c/38c9fa2cc6bf4b6e1a74057aef8b5cffd23d3264
- https://git.kernel.org/stable/c/e9b5a4566d5bc71cc901be50d1fa24da00613120
- https://git.kernel.org/stable/c/57b962e627ec0ae53d4d16d7bd1033e27e67677a
Frequently Asked Questions
What is the severity of CVE-2022-49881?
CVE-2022-49881 has been classified with medium severity due to its potential impact on system stability.
How do I fix CVE-2022-49881?
To fix CVE-2022-49881, update to the latest version of the Linux kernel where this vulnerability has been patched.
What systems are affected by CVE-2022-49881?
CVE-2022-49881 affects various versions of the Linux kernel, particularly those utilizing the cfg80211 subsystem related to Wi-Fi.
What type of vulnerability is CVE-2022-49881?
CVE-2022-49881 is a memory leak vulnerability that occurs in the query_regdb_file() function of the Linux kernel.
Can CVE-2022-49881 be exploited remotely?
CVE-2022-49881 does not appear to be exploitable remotely as it requires specific kernel operations to trigger the memory leak.
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