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Vulnerability · Published Mar 1, 2024 · Assigned by Linux

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

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 84.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-abi-stablelists4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-core4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-cross-headers4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-debug4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-debug-core4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-debug-devel4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-debug-modules4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-devel4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-doc4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-headers4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-modules4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-modules-extra4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-rt4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-rt-core4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-rt-debug4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-rt-debug-core4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-rt-debug-kvm4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-rt-devel4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-rt-kvm4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-rt-modules4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.8.1.rt7.349.el8_10ALSA-2024:4352
AlmaLinux:8kernel-tools4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-tools-libs4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-zfcpdump4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8perf4.18.0-553.8.1.el8_10ALSA-2024:4211
AlmaLinux:8python3-perf4.18.0-553.8.1.el8_10ALSA-2024:4211
Debian:12linux5.10.40-1DEBIAN-CVE-2021-47073
Debian:13linux5.10.40-1DEBIAN-CVE-2021-47073
Debian:14linux5.10.40-1DEBIAN-CVE-2021-47073
Rocky Linux:8kernel0:4.18.0-553.8.1.el8_10RLSA-2024:4211
Rocky Linux:8kernel-rt0:4.18.0-553.8.1.rt7.349.el8_10RLSA-2024:4352
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47073
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47073
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47073

Affected products (as reported)

VendorProductVersions
Linux Linux 1a258e670434f404a4500b65ba1afea2c2b29bba – before 75cfc833da4a2111106d4c134e93e0c7f41e35e71a258e670434f404a4500b65ba1afea2c2b29bba – before 6fa78a6b9a3beb676a010dc489c1257f7e4325251a258e670434f404a4500b65ba1afea2c2b29bba – before 0cf036a0d325200e6c27b90908e51195bbc557b11a258e670434f404a4500b65ba1afea2c2b29bba – before 8d746ea7c687bab060a2c05a35c449302406cd521a258e670434f404a4500b65ba1afea2c2b29bba – before 3a53587423d25c87af4b4126a806a0575104b45e
Linux Linux 4.15

References