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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。

AI Predicted 3.6 Difficulty: Easy EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1562.008

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 1a258e670434f404a4500b65ba1afea2c2b29bba< 75cfc833da4a2111106d4c134e93e0c7f41e35e7 affected
1a258e670434f404a4500b65ba1afea2c2b29bba< 6fa78a6b9a3beb676a010dc489c1257f7e432525 affected
1a258e670434f404a4500b65ba1afea2c2b29bba< 0cf036a0d325200e6c27b90908e51195bbc557b1 affected
1a258e670434f404a4500b65ba1afea2c2b29bba< 8d746ea7c687bab060a2c05a35c449302406cd52 affected
1a258e670434f404a4500b65ba1afea2c2b29bba< 3a53587423d25c87af4b4126a806a0575104b45e affected
4.15 affected
< 4.15 unaffected
4.19.192≤ 4.19.* unaffected
… +4 more rows
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I. Basic Information for CVE-2021-47073

Vulnerability Information
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Vulnerability Title
platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1a258e670434f404a4500b65ba1afea2c2b29bba ~ 75cfc833da4a2111106d4c134e93e0c7f41e35e7 -
Linux Linux 4.15 -

II. Public POCs for CVE-2021-47073

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III. Intelligence Information for CVE-2021-47073

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Other References for CVE-2021-47073 (4)

Same Patch Batch · Linux · 2024-03-01 · 13 CVEs total

CVE-2021-47081 7.8 HIGH habanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory
CVE-2021-47078 7.8 HIGH RDMA/rxe: Clear all QP fields if creation failed
CVE-2021-47069 7.8 HIGH ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry
CVE-2021-47080 RDMA/core: Prevent divide-by-zero error triggered by the user
CVE-2021-47079 platform/x86: ideapad-laptop: fix a NULL pointer dereference
CVE-2021-47077 scsi: qedf: Add pointer checks in qedf_update_link_speed()
CVE-2021-47075 nvmet: fix memory leak in nvmet_alloc_ctrl()
CVE-2021-47076 RDMA/rxe: Return CQE error if invalid lkey was supplied
CVE-2021-47074 nvme-loop: fix memory leak in nvme_loop_create_ctrl()
CVE-2021-47072 btrfs: fix removed dentries still existing after log is synced
CVE-2021-47071 uio_hv_generic: Fix a memory leak in error handling paths
CVE-2021-47070 uio_hv_generic: Fix another memory leak in error handling paths

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47073

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