CVE-2026-72004
wifi: mac80211: fix memory leak in ieee80211_register_hw()
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 09b4a4faf9d037990ac4f8110dd944b27b42d5df; < f01eec75fd372961550b928902f3a2c11fca1daf (affected, git) ≥ 09b4a4faf9d037990ac4f8110dd944b27b42d5df; < 3d8b9b290421c3cd505fcd2f551f143f8142786a (affected, git) ≥ 09b4a4faf9d037990ac4f8110dd944b27b42d5df; < 08b71bd92317f99642b842cfc0d30200868162fc (affected, git) ≥ 09b4a4faf9d037990ac4f8110dd944b27b42d5df; < a02b52fe54f7b5107aefa1ce28c2f69749c57616 (affected, git) ≥ 09b4a4faf9d037990ac4f8110dd944b27b42d5df; < 45e9ac538cdff7bce656d731114a64eda85af0d7 (affected, git) ≥ 09b4a4faf9d037990ac4f8110dd944b27b42d5df; < bdc0b8bfdc142439d6708b072e8159eb515ee7b0 (affected, git) ≥ 09b4a4faf9d037990ac4f8110dd944b27b42d5df; < a7584f261e64fe14e45bdf70f343e16c1ee3a037 (affected, git) ≥ 09b4a4faf9d037990ac4f8110dd944b27b42d5df; < 95fc02722edde02946d0d475221f2b2054d3d8ba (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
4.20 (affected) ≥ 0; < 4.20 (unaffected, semver) ≥ 5.10.261; ≤ 5.10.* (unaffected, semver) ≥ 5.15.212; ≤ 5.15.* (unaffected, semver) ≥ 6.1.178; ≤ 6.1.* (unaffected, semver) ≥ 6.6.145; ≤ 6.6.* (unaffected, semver) ≥ 6.12.97; ≤ 6.12.* (unaffected, semver) ≥ 6.18.40; ≤ 6.18.* (unaffected, semver) ≥ 7.1.5; ≤ 7.1.* (unaffected, semver) ≥ 7.2; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/f01eec75fd372961550b928902f3a2c11fca1dafCNA: Linux
- https://git.kernel.org/stable/c/3d8b9b290421c3cd505fcd2f551f143f8142786aCNA: Linux
- https://git.kernel.org/stable/c/08b71bd92317f99642b842cfc0d30200868162fcCNA: Linux
- https://git.kernel.org/stable/c/a02b52fe54f7b5107aefa1ce28c2f69749c57616CNA: Linux
- https://git.kernel.org/stable/c/45e9ac538cdff7bce656d731114a64eda85af0d7CNA: Linux
- https://git.kernel.org/stable/c/bdc0b8bfdc142439d6708b072e8159eb515ee7b0CNA: Linux
- https://git.kernel.org/stable/c/a7584f261e64fe14e45bdf70f343e16c1ee3a037CNA: Linux
- https://git.kernel.org/stable/c/95fc02722edde02946d0d475221f2b2054d3d8baCNA: Linux
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