CVE-2021-47194

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxac800140c20e7ae51117e71289065bedd4930fc2 < 8f06bb8c216bcd172394f61e557727e691b4cb24affected
LinuxLinuxac800140c20e7ae51117e71289065bedd4930fc2 < 0738cdb636c21ab552eaecf905efa4a6070e3ebcaffected
LinuxLinuxac800140c20e7ae51117e71289065bedd4930fc2 < 4e458abbb4a523f1413bfe15c079cf4e24c15b21affected
LinuxLinuxac800140c20e7ae51117e71289065bedd4930fc2 < b8a045e2a9b234cfbc06cf36923886164358ddecaffected
LinuxLinuxac800140c20e7ae51117e71289065bedd4930fc2 < 52affc201fc22a1ab9a59ef0ed641a9adfcb8d13affected
LinuxLinuxac800140c20e7ae51117e71289065bedd4930fc2 < 7b97b5776daa0b39dbdadfea176f9cc0646d4a66affected
LinuxLinuxac800140c20e7ae51117e71289065bedd4930fc2 < 5a9b671c8d74a3e1b999e7a0c7f366079bcc93ddaffected
LinuxLinuxac800140c20e7ae51117e71289065bedd4930fc2 < 563fbefed46ae4c1f70cffb8eb54c02df480b2c2affected
LinuxLinux3.6affected
LinuxLinux0 < 3.6unaffected
LinuxLinux4.4.293 <= 4.4.*unaffected
LinuxLinux4.9.291 <= 4.9.*unaffected
LinuxLinux4.14.256 <= 4.14.*unaffected
LinuxLinux4.19.218 <= 4.19.*unaffected
LinuxLinux5.4.162 <= 5.4.*unaffected
LinuxLinux5.10.82 <= 5.10.*unaffected
LinuxLinux5.15.5 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References