Linux Kernel up to 6.5.12/6.6.2 scsi ufshcd_mcq_abort null pointer dereference

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.5.12/6.6.2. It has been classified as critical. Affected by this issue is the function ufshcd_mcq_abort of the component scsi. This manipulation causes null pointer dereference. This vulnerability is registered as CVE-2023-52785. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.5.12/6.6.2 and classified as critical. Affected by this vulnerability is the function ufshcd_mcq_abort of the component scsi. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. 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: Fix racing issue between ufshcd_mcq_abort() and ISR If command timeout happens and cq complete IRQ is raised at the same time, ufshcd_mcq_abort clears lprb->cmd and a NULL pointer deref happens in the ISR. Error log: ufshcd_abort: Device abort task at tag 18 Unable to handle kernel NULL pointer dereference at virtual address 0000000000000108 pc : [0xffffffe27ef867ac] scsi_dma_unmap+0xc/0x44 lr : [0xffffffe27f1b898c] ufshcd_release_scsi_cmd+0x24/0x114

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-52785. Technical details are known, but no exploit is available.

Upgrading to version 6.5.13 or 6.6.3 eliminates this vulnerability. Applying the patch 8f15a7e3c054/f84d461f33a6/27900d7119c4 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.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.5.0
• 6.5.1
• 6.5.2
• 6.5.3
• 6.5.4
• 6.5.5
• 6.5.6
• 6.5.7
• 6.5.8
• 6.5.9
• 6.5.10
• 6.5.11
• 6.5.12
• 6.6.0
• 6.6.1
• 6.6.2

License

• open-source

Website

• Vendor: https://www.kernel.org/

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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