CVE-2021-47073

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

EPSS 0.2%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

01 Mar 2024Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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 products

Linux · Linux

References

https://git.kernel.org/stable/c/0cf036a0d325200e6c27b90908e51195bbc557b1 https://git.kernel.org/stable/c/3a53587423d25c87af4b4126a806a0575104b45e https://git.kernel.org/stable/c/6fa78a6b9a3beb676a010dc489c1257f7e432525 https://git.kernel.org/stable/c/75cfc833da4a2111106d4c134e93e0c7f41e35e7 https://git.kernel.org/stable/c/8d746ea7c687bab060a2c05a35c449302406cd52