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CVE-2021-47073

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

MEDIUM
5.5
CVSS Score
Published: March 1, 2024 at 09:15 PM UTC
Updated: June 17, 2026 at 04:16 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
4.15 ≤ v < 4.19.1924.15 ≤ v < 5.10.404.15 ≤ v < 5.12.74.15 ≤ v < 5.134.15 ≤ v < 5.4.1224.20 ≤ v < 5.4.1225.11 ≤ v < 5.12.75.5 ≤ v < 5.10.401a258e670434f404a4500b65ba1afea2c2b29bba5.13 rc15.13 rc2
Vendor states this is fixed in 0cf036a0d325200e6c27b90908e51195bbc557b1 (fixed)
Vendor states this is fixed in 3a53587423d25c87af4b4126a806a0575104b45e (fixed)
Vendor states this is fixed in 6fa78a6b9a3beb676a010dc489c1257f7e432525 (fixed)
Vendor states this is fixed in 75cfc833da4a2111106d4c134e93e0c7f41e35e7 (fixed)
Vendor states this is fixed in 8d746ea7c687bab060a2c05a35c449302406cd52 (fixed)
Vendor states this is fixed in 4.15 (unaffected)
Vendor states this is fixed in 4.19.192 (unaffected)
Vendor states this is fixed in 5.10.40 (unaffected)
Vendor states this is fixed in 5.12.7 (unaffected)
Vendor states this is fixed in 5.13 (unaffected)
Vendor states this is fixed in 5.4.122 (unaffected)

References (5)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/0cf036a0d325200e6c27b90908e51195bbc557b1
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/3a53587423d25c87af4b4126a806a0575104b45e
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6fa78a6b9a3beb676a010dc489c1257f7e432525
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/75cfc833da4a2111106d4c134e93e0c7f41e35e7
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8d746ea7c687bab060a2c05a35c449302406cd52

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
NVD-CWE-noinfo

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