medium
5.5
Advisory Published
Updated

CVE-2021-47073: platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios

First published: Fri Mar 01 2024(Updated: )

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.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
Linux Kernel>=4.15<4.19.192
Linux Kernel>=4.20<5.4.122
Linux Kernel>=5.5<5.10.40
Linux Kernel>=5.11<5.12.7
Linux Kernel=5.13-rc1
Linux Kernel=5.13-rc2
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Software Stack<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Virtual Appliance<=ISVG 10.0.2
IBM Security Verify Governance Identity Manager Container<=ISVG 10.0.2

Remedy

https://git.kernel.org/stable/c/0cf036a0d325200e6c27b90908e51195bbc557b1

Remedy

https://git.kernel.org/stable/c/3a53587423d25c87af4b4126a806a0575104b45e

Remedy

https://git.kernel.org/stable/c/6fa78a6b9a3beb676a010dc489c1257f7e432525

Remedy

https://git.kernel.org/stable/c/75cfc833da4a2111106d4c134e93e0c7f41e35e7

Remedy

https://git.kernel.org/stable/c/8d746ea7c687bab060a2c05a35c449302406cd52

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2021-47073?

    CVE-2021-47073 is classified as a low severity vulnerability affecting the Linux kernel.

  • How do I fix CVE-2021-47073?

    To fix CVE-2021-47073, update the Linux kernel to a version that includes the fix, specifically versions beyond those mentioned in the vulnerability.

  • What systems are affected by CVE-2021-47073?

    CVE-2021-47073 affects multiple versions of the Linux kernel, particularly those between 4.15 and 5.13-rc2.

  • What is the impact of CVE-2021-47073?

    The impact of CVE-2021-47073 includes potential system instability when unloading the dell_smbios module.

  • Is CVE-2021-47073 a remote execution vulnerability?

    No, CVE-2021-47073 is not a remote execution vulnerability; it is related to local module management issues.

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