VDB-257840 · CVE-2021-47176 · WID-SEC-2024-0699

Linux Kernel up to 5.4.236/5.10.174/5.12.8 s390 dasd_generic_verify_path denial of service

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5.5	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 5.4.236/5.10.174/5.12.8. Affected by this vulnerability is the function dasd_generic_verify_path of the component s390. Such manipulation leads to denial of service. This vulnerability is referenced as CVE-2021-47176. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.4.236/5.10.174/5.12.8. It has been rated as critical. Affected by this issue is the function dasd_generic_verify_path of the component s390. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: add missing discipline function Fix crash with illegal operation exception in dasd_device_tasklet. Commit b72949328869 ("s390/dasd: Prepare for additional path event handling") renamed the verify_path function for ECKD but not for FBA and DIAG. This leads to a panic when the path verification function is called for a FBA or DIAG device. Fix by defining a wrapper function for dasd_generic_verify_path().

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2021-47176. There are known technical details, but no exploit is available.

Upgrading to version 5.4.237, 5.10.175, 5.12.9 or 5.13 eliminates this vulnerability. Applying the patch 6a16810068e7/aa8579bc0846/a16be88a3d7e/c0c8a8397fa8 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 CERT Bund (WID-SEC-2024-0699). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
EMC Avamar
Dell NetWorker
Open Source Linux Kernel
IBM Spectrum Protect Plus

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.4.237/5.10.175/5.12.9/5.13
Patch: 6a16810068e7/aa8579bc0846/a16be88a3d7e/c0c8a8397fa8