Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: fix memory leak in ieee80211_register_hw()
If kmemdup() fails while copying supported band structures, the error path jumps to fail_rate. This skips rate_control_deinitialize() and leaks the initialized local->rate_ctrl.
Fix this by adding a fail_band label that shares the rate-control cleanup path before falling through to the remaining teardown.
The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc7.
An x86_64 allyesconfig build showed no new warnings. As we do not have a suitable mac80211 device/driver combination to test with, no runtime testing was able to be performed.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 09b4a4faf9d037990ac4f8110dd944b27b42d5df, < f01eec75fd372961550b928902f3a2c11fca1daf; >= 09b4a4faf9d037990ac4f8110dd944b27b42d5df, < 3d8b9b290421c3cd505fcd2f551f143f8142786a; >= 09b4a4faf9d037990ac4f8110dd944b27b42d5df, < 08b71bd92317f99642b842cfc0d30200868162fc; >= 09b4a4faf9d037990ac4f8110dd944b27b42d5df, < a02b52fe54f7b5107aefa1ce28c2f69749c57616; >= 09b4a4faf9d037990ac4f8110dd944b27b42d5df, < 45e9ac538cdff7bce656d731114a64eda85af0d7; >= 09b4a4faf9d037990ac4f8110dd944b27b42d5df, < bdc0b8bfdc142439d6708b072e8159eb515ee7b0; >= 09b4a4faf9d037990ac4f8110dd944b27b42d5df, < a7584f261e64fe14e45bdf70f343e16c1ee3a037; >= 09b4a4faf9d037990ac4f8110dd944b27b42d5df, < 95fc02722edde02946d0d475221f2b2054d3d8ba |
| Linux | Linux | 4.20 |
References
- https://git.kernel.org/stable/c/08b71bd92317f99642b842cfc0d30200868162fc
- https://git.kernel.org/stable/c/3d8b9b290421c3cd505fcd2f551f143f8142786a
- https://git.kernel.org/stable/c/45e9ac538cdff7bce656d731114a64eda85af0d7
- https://git.kernel.org/stable/c/95fc02722edde02946d0d475221f2b2054d3d8ba
- https://git.kernel.org/stable/c/a02b52fe54f7b5107aefa1ce28c2f69749c57616
- https://git.kernel.org/stable/c/a7584f261e64fe14e45bdf70f343e16c1ee3a037
- https://git.kernel.org/stable/c/bdc0b8bfdc142439d6708b072e8159eb515ee7b0
- https://git.kernel.org/stable/c/f01eec75fd372961550b928902f3a2c11fca1daf
Timeline
- Published
- Aug 15, 2026
- Last modified
- Nov 6, 2026
- NVD status
- Received