Linux Kernel up to 5.15/5.15.4 scsi ufshcd.c ufshcd_queuecommand denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.15/5.15.4. It has been rated as problematic. This affects the function ufshcd_queuecommand of the file drivers/scsi/ufs/ufshcd.c of the component scsi. This manipulation causes denial of service. This vulnerability appears as CVE-2021-47188. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.15/5.15.4. It has been declared as problematic. Affected by this vulnerability is the function ufshcd_queuecommand of the file drivers/scsi/ufs/ufshcd.c of the component scsi. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Improve SCSI abort handling The following has been observed on a test setup: WARNING: CPU: 4 PID: 250 at drivers/scsi/ufs/ufshcd.c:2737 ufshcd_queuecommand+0x468/0x65c Call trace: ufshcd_queuecommand+0x468/0x65c scsi_send_eh_cmnd+0x224/0x6a0 scsi_eh_test_devices+0x248/0x418 scsi_eh_ready_devs+0xc34/0xe58 scsi_error_handler+0x204/0x80c kthread+0x150/0x1b4 ret_from_fork+0x10/0x30 That warning is triggered by the following statement: WARN_ON(lrbp->cmd); Fix this warning by clearing lrbp->cmd from the abort handler.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2021-47188 since 03/25/2024. The exploitation appears to be difficult. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 207818 (ubuntu_linux USN-7039-1: Ubuntu 14.04 LTS / Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-7039-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.15.5 or 5.16 eliminates this vulnerability. Applying the patch c36baca06efa/3ff1f6b6ba6f is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (207818). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 207818
Nessus Name: ubuntu_linux USN-7039-1: Ubuntu 14.04 LTS / Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-7039-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.15.5/5.16
Patch: c36baca06efa/3ff1f6b6ba6f

Timelineinfo

03/25/2024 🔍
04/10/2024 +15 days 🔍
04/10/2024 +0 days 🔍
08/05/2026 +847 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-47188 (🔍)
GCVE (CVE): GCVE-0-2021-47188
GCVE (VulDB): GCVE-100-260323

Entryinfo

Created: 04/10/2024 21:46
Updated: 08/05/2026 11:30
Changes: 04/10/2024 21:46 (23), 04/10/2024 21:47 (36), 09/27/2024 04:26 (3), 06/01/2026 22:21 (12), 08/05/2026 11:30 (13)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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