CVE-2026-72004
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.
How to fix
- Linux Linuxf01eec75fd372961550b928902f3a2c11fca1daf, 3d8b9b290421c3cd505fcd2f551f143f8142786a, 08b71bd92317f99642b842cfc0d30200868162fc, a02b52fe54f7b5107aefa1ce28c2f69749c57616, 45e9ac538cdff7bce656d731114a64eda85af0d7, bdc0b8bfdc142439d6708b072e8159eb515ee7b0, a7584f261e64fe14e45bdf70f343e16c1ee3a037, 95fc02722edde02946d0d475221f2b2054d3d8ba or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 09b4a4faf9d037990ac4f8110dd944b27b42d5df ≤ v < f01eec75fd372961550b928902f3a2c11fca1daf, 09b4a4faf9d037990ac4f8110dd944b27b42d5df ≤ v < 3d8b9b290421c3cd505fcd2f551f143f8142786a, 09b4a4faf9d037990ac4f8110dd944b27b42d5df ≤ v < 08b71bd92317f99642b842cfc0d30200868162fc, 09b4a4faf9d037990ac4f8110dd944b27b42d5df ≤ v < a02b52fe54f7b5107aefa1ce28c2f69749c57616, 09b4a4faf9d037990ac4f8110dd944b27b42d5df ≤ v < 45e9ac538cdff7bce656d731114a64eda85af0d7, 09b4a4faf9d037990ac4f8110dd944b27b42d5df ≤ v < bdc0b8bfdc142439d6708b072e8159eb515ee7b0, 09b4a4faf9d037990ac4f8110dd944b27b42d5df ≤ v < a7584f261e64fe14e45bdf70f343e16c1ee3a037, 09b4a4faf9d037990ac4f8110dd944b27b42d5df ≤ v < 95fc02722edde02946d0d475221f2b2054d3d8ba, 4.20 | f01eec75fd372961550b928902f3a2c11fca1daf, 3d8b9b290421c3cd505fcd2f551f143f8142786a, 08b71bd92317f99642b842cfc0d30200868162fc, a02b52fe54f7b5107aefa1ce28c2f69749c57616, 45e9ac538cdff7bce656d731114a64eda85af0d7, bdc0b8bfdc142439d6708b072e8159eb515ee7b0, a7584f261e64fe14e45bdf70f343e16c1ee3a037, 95fc02722edde02946d0d475221f2b2054d3d8ba |
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