5.5

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

Analyzed
AliasesUBUNTU-CVE-2021-47073DEBIAN-CVE-2021-47073
Published 01-03-2024Last modified 11-05-2026

Vulnerability summary

CVE-2021-47073 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 6
RHSA-2024:4211RHSA-2024:4352SUSE-SU-2024:1454-1SUSE-SU-2024:1465-1SUSE-SU-2024:1489-1SUSE-SU-2024:1643-1

Timeline

  1. 01-03-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu85 products
  • linux< 4.15.0-151.157 | < 5.4.0-80.90
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.15.0-1109.116 | < 5.4.0-1054.57
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1a258e670434f404a4500b65ba1afea2c2b29bba, < 75cfc833da4a2111106d4c134e93e0c7f41e35e7 | ≥ 1a258e670434f404a4500b65ba1afea2c2b29bba, < 6fa78a6b9a3beb676a010dc489c1257f7e432525 | ≥ 1a258e670434f404a4500b65ba1afea2c2b29bba, < 0cf036a0d325200e6c27b90908e51195bbc557b1 | ≥ 1a258e670434f404a4500b65ba1afea2c2b29bba, < 8d746ea7c687bab060a2c05a35c449302406cd52 | ≥ 1a258e670434f404a4500b65ba1afea2c2b29bba, < 3a53587423d25c87af4b4126a806a0575104b45e | 4.15
  • linux_kernel≥ 4.15, < 4.19.192 | ≥ 4.20, < 5.4.122 | ≥ 5.5, < 5.10.40 | ≥ 5.11, < 5.12.7 | 5.13:rc1 | 5.13:rc2
Debian1 product
  • linux< 5.10.40-1

3 vendors · 88 products

References

9 links