CVE-2021-47073

Summary

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

platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios

init_dell_smbios_wmi() only registers the dell_smbios_wmi_driver on systems where the Dell WMI interface is supported. While exit_dell_smbios_wmi() unregisters it unconditionally, this leads to the following oops:

[ 175.722921] ————[ cut here ]———— [ 175.722925] Unexpected driver unregister! [ 175.722939] WARNING: CPU: 1 PID: 3630 at drivers/base/driver.c:194 driver_unregister+0x38/0x40 … [ 175.723089] Call Trace: [ 175.723094] cleanup_module+0x5/0xedd [dell_smbios] … [ 175.723148] —[ end trace 064c34e1ad49509d ]—

Make the unregister happen on the same condition the register happens to fix this.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1a258e670434f404a4500b65ba1afea2c2b29bba < 75cfc833da4a2111106d4c134e93e0c7f41e35e7affected
LinuxLinux1a258e670434f404a4500b65ba1afea2c2b29bba < 6fa78a6b9a3beb676a010dc489c1257f7e432525affected
LinuxLinux1a258e670434f404a4500b65ba1afea2c2b29bba < 0cf036a0d325200e6c27b90908e51195bbc557b1affected
LinuxLinux1a258e670434f404a4500b65ba1afea2c2b29bba < 8d746ea7c687bab060a2c05a35c449302406cd52affected
LinuxLinux1a258e670434f404a4500b65ba1afea2c2b29bba < 3a53587423d25c87af4b4126a806a0575104b45eaffected
LinuxLinux4.15affected
LinuxLinux0 < 4.15unaffected
LinuxLinux4.19.192 <= 4.19.*unaffected
LinuxLinux5.4.122 <= 5.4.*unaffected
LinuxLinux5.10.40 <= 5.10.*unaffected
LinuxLinux5.12.7 <= 5.12.*unaffected
LinuxLinux5.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References