Linux Kernel up to 5.11.20/5.12.3 lpfc lpfc_prep_els_iocb null pointer dereference

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 5.11.20/5.12.3. Affected by this vulnerability is the function lpfc_prep_els_iocb of the component lpfc. The manipulation results in null pointer dereference. This vulnerability is known as CVE-2021-47045. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 5.11.20/5.12.3 (Operating System). Affected is the function lpfc_prep_els_iocb of the component lpfc. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix null pointer dereference in lpfc_prep_els_iocb() It is possible to call lpfc_issue_els_plogi() passing a did for which no matching ndlp is found. A call is then made to lpfc_prep_els_iocb() with a null pointer to a lpfc_nodelist structure resulting in a null pointer dereference. Fix by returning an error status if no valid ndlp is found. Fix up comments regarding ndlp reference counting.

The weakness was published 02/28/2024. The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2021-47045 since 02/27/2024. Technical details are known, but there is no available exploit.

Upgrading to version 5.11.21, 5.12.4 or 5.13 eliminates this vulnerability. Applying the patch a09677de458d/9bdcfbed2a9f/8dd1c125f7f8 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.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.11.0
• 5.11.1
• 5.11.2
• 5.11.3
• 5.11.4
• 5.11.5
• 5.11.6
• 5.11.7
• 5.11.8
• 5.11.9
• 5.11.10
• 5.11.11
• 5.11.12
• 5.11.13
• 5.11.14
• 5.11.15
• 5.11.16
• 5.11.17
• 5.11.18
• 5.11.19
• 5.11.20
• 5.12.0
• 5.12.1
• 5.12.2
• 5.12.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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