CVE-2023-52864

Summary

In the Linux kernel, the following vulnerability has been resolved:

platform/x86: wmi: Fix opening of char device

Since commit fa1f68db6ca7 ("drivers: misc: pass miscdevice pointer via file private data"), the miscdevice stores a pointer to itself inside filp->private_data, which means that private_data will not be NULL when wmi_char_open() is called. This might cause memory corruption should wmi_char_open() be unable to find its driver, something which can happen when the associated WMI device is deleted in wmi_free_devices().

Fix the problem by using the miscdevice pointer to retrieve the WMI device data associated with a char device using container_of(). This also avoids wmi_char_open() picking a wrong WMI device bound to a driver with the same name as the original driver.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 < cf098e937dd125c0317a0d6f261ac2a950a233d6affected
LinuxLinux44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 < 9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203affected
LinuxLinux44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 < d426a2955e45a95b2282764105fcfb110a540453affected
LinuxLinux44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 < e0bf076b734a2fab92d8fddc2b8b03462eee7097affected
LinuxLinux44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 < 44a96796d25809502c75771d40ee693c2e44724eaffected
LinuxLinux44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 < 36d85fa7ae0d6be651c1a745191fa7ef055db43eaffected
LinuxLinux44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 < fb7b06b59c6887659c6ed0ecd3110835eecbb6a3affected
LinuxLinux44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 < eba9ac7abab91c8f6d351460239108bef5e7a0b6affected
LinuxLinux4.15affected
LinuxLinux0 < 4.15unaffected
LinuxLinux4.19.299 <= 4.19.*unaffected
LinuxLinux5.4.261 <= 5.4.*unaffected
LinuxLinux5.10.201 <= 5.10.*unaffected
LinuxLinux5.15.139 <= 5.15.*unaffected
LinuxLinux6.1.63 <= 6.1.*unaffected
LinuxLinux6.5.12 <= 6.5.*unaffected
LinuxLinux6.6.2 <= 6.6.*unaffected
LinuxLinux6.7 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References