# CVE-2025-39674: linux: In the Linux kernel, the following vulnerability has been resolved:  scsi: ufs: ufs-qcom: Fix ESI null pointer derefe...

CVE-2025-39674 is fixed in linux on 1 platform by DEBIAN-CVE-2025-39674 (version 6.16.5-1), released September 5, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-39674
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 5, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  scsi: ufs: ufs-qcom: Fix ESI null pointer dereference  ESI/MSI is a performance optimization feature that provides dedicated interrupts per MCQ hardware queue. This is optional feature and UFS MCQ should work with and without ESI feature.  Commit e46a28cea29a ("scsi: ufs: qcom: Remove the MSI descriptor abuse") brings a regression in ESI (Enhanced System Interrupt) configuration that causes a null pointer dereference when Platform MSI allocation fails.  The issue occurs in when platform_device_msi_init_and_alloc_irqs() in ufs_qcom_config_esi() fails (returns -EINVAL) but the current code uses __free() macro for automatic cleanup free MSI resources that were never successfully allocated.  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008    Call trace:   mutex_lock+0xc/0x54 (P)   platform_device_msi_free_irqs_all+0x1c/0x40   ufs_qcom_config_esi+0x1d0/0x220 [ufs_qcom]   ufshcd_config_mcq+0x28/0x104   ufshcd_init+0xa3c/0xf40   ufshcd_pltfrm_init+0x504/0x7d4   ufs_qcom_probe+0x20/0x58 [ufs_qcom]  Fix by restructuring the ESI configuration to try MSI allocation first, before any other resource allocation and instead use explicit cleanup instead of __free() macro to avoid cleanup of unallocated resources.  Tested on SM8750 platform with MCQ enabled, both with and without Platform ESI support.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.16.5-1 | [DEBIAN-CVE-2025-39674](https://patchblox.com/security/data/fix/linux/debian-cve-2025-39674.md) | Sep 5, 2025 |

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