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CVE-2026-72004

wifi: mac80211: fix memory leak in ieee80211_register_hw()

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.

Timeline

  1. ID reserved

    By Linux

  2. · 6 days later

    Published

  3. · 3 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.

EPSS (exploitation in 30 days)
0.22% · top 87% of all CVEs (11 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • Linux · Linux

    • affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df – < f01eec75fd372961550b928902f3a2c11fca1daf
    • affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df – < 3d8b9b290421c3cd505fcd2f551f143f8142786a
    • affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df – < 08b71bd92317f99642b842cfc0d30200868162fc
    • affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df – < a02b52fe54f7b5107aefa1ce28c2f69749c57616
    • affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df – < 45e9ac538cdff7bce656d731114a64eda85af0d7
    • affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df – < bdc0b8bfdc142439d6708b072e8159eb515ee7b0
    • affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df – < a7584f261e64fe14e45bdf70f343e16c1ee3a037
    • affected 09b4a4faf9d037990ac4f8110dd944b27b42d5df – < 95fc02722edde02946d0d475221f2b2054d3d8ba
  • Linux · Linux

    • affected 4.20
    • unaffected < 4.20
    • unaffected 5.10.261 – ≤ 5.10.*
    • unaffected 5.15.212 – ≤ 5.15.*
    • unaffected 6.1.178 – ≤ 6.1.*
    • unaffected 6.6.145 – ≤ 6.6.*
    • unaffected 6.12.97 – ≤ 6.12.*
    • unaffected 6.18.40 – ≤ 6.18.*
    • unaffected 7.1.5 – ≤ 7.1.*
    • unaffected 7.2 – ≤ *

References

8

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .