wifi: mac80211: fix memory leak in ieee80211_register_hw()
Summary
| CVE | CVE-2026-72004 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:20:58 UTC |
| Updated | 2026-08-17 06:17:57 UTC |
| 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. |
Risk And Classification
EPSS: 0.002100000 probability, percentile 0.115410000 (date 2026-08-17)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df f01eec75fd372961550b928902f3a2c11fca1daf git | Not specified |
| CNA | Linux | Linux | affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df 3d8b9b290421c3cd505fcd2f551f143f8142786a git | Not specified |
| CNA | Linux | Linux | affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df 08b71bd92317f99642b842cfc0d30200868162fc git | Not specified |
| CNA | Linux | Linux | affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df a02b52fe54f7b5107aefa1ce28c2f69749c57616 git | Not specified |
| CNA | Linux | Linux | affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df 45e9ac538cdff7bce656d731114a64eda85af0d7 git | Not specified |
| CNA | Linux | Linux | affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df bdc0b8bfdc142439d6708b072e8159eb515ee7b0 git | Not specified |
| CNA | Linux | Linux | affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df a7584f261e64fe14e45bdf70f343e16c1ee3a037 git | Not specified |
| CNA | Linux | Linux | affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df 95fc02722edde02946d0d475221f2b2054d3d8ba git | Not specified |
| CNA | Linux | Linux | affected 4.20 | Not specified |
| CNA | Linux | Linux | unaffected 4.20 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.261 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.97 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/a02b52fe54f7b5107aefa1ce28c2f69749c57616 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3d8b9b290421c3cd505fcd2f551f143f8142786a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/95fc02722edde02946d0d475221f2b2054d3d8ba | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/bdc0b8bfdc142439d6708b072e8159eb515ee7b0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f01eec75fd372961550b928902f3a2c11fca1daf | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a7584f261e64fe14e45bdf70f343e16c1ee3a037 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/45e9ac538cdff7bce656d731114a64eda85af0d7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/08b71bd92317f99642b842cfc0d30200868162fc | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.