CVE-2021-47194 Information

Apr 11, 2024 cve

Description

In the Linux kernel the following vulnerability has been resolved:

cfg80211: call cfg80211_stop_ap when switch from P2P_GO type

If the userspace tools switch from NL80211_IFTYPE_P2P_GO to NL80211_IFTYPE_ADHOC via send_msg(NL80211_CMD_SET_INTERFACE) it does not call the cleanup cfg80211_stop_ap() this leads to the initialization of in-use data. For example this path re-init the sdata->assigned_chanctx_list while it is still an element of assigned_vifs list and makes that linked list corrupt.

Reference

https://git.kernel.org/stable/c/8f06bb8c216bcd172394f61e557727e691b4cb24 https://git.kernel.org/stable/c/0738cdb636c21ab552eaecf905efa4a6070e3ebc https://git.kernel.org/stable/c/4e458abbb4a523f1413bfe15c079cf4e24c15b21 https://git.kernel.org/stable/c/b8a045e2a9b234cfbc06cf36923886164358ddec https://git.kernel.org/stable/c/52affc201fc22a1ab9a59ef0ed641a9adfcb8d13 https://git.kernel.org/stable/c/7b97b5776daa0b39dbdadfea176f9cc0646d4a66 https://git.kernel.org/stable/c/5a9b671c8d74a3e1b999e7a0c7f366079bcc93dd https://git.kernel.org/stable/c/563fbefed46ae4c1f70cffb8eb54c02df480b2c2

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