In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: exynos: Fix programming of HCI_UTRL_NEXUS_TYPE On Google gs101, the number of UTP transfer request slots (nutrs) is 32, and in this case the driver ends up programming the UTRL_NEXUS_TYPE incorrectly as 0. This is because the left hand side of the shift is 1, which is of type int, i.e. 31 bits wide. Shifting by more than that width results in undefined behaviour. Fix this by switching to the BIT() macro, which applies correct type casting as required. This ensures the correct value is written to UTRL_NEXUS_TYPE (0xffffffff on gs101), and it also fixes a UBSAN shift warning: UBSAN: shift-out-of-bounds in drivers/ufs/host/ufs-exynos.c:1113:21 shift exponent 32 is too large for 32-bit type 'int' For consistency, apply the same change to the nutmrs / UTMRL_NEXUS_TYPE write.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/01510a9e8222f11cce064410f3c2fcf0756c0a08 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/01aad16c2257ab8ff33b152b972c9f2e1af47912 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/098b2c8ee208c77126839047b9e6e1925bb35baa cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/5b9f1ef293428ea9c0871d96fcec2a87c4445832 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/6d53b2a134da77eb7fe65c5c7c7a3c193539a78a cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/c1f025da8f370a015e412b55cbcc583f91de8316 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/dc8fb963742f1a38d284946638f9358bdaa0ddee cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-39788 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-39788 cve-icon
History

Fri, 12 Sep 2025 08:15:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Fri, 12 Sep 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Moderate

Thu, 11 Sep 2025 17:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: exynos: Fix programming of HCI_UTRL_NEXUS_TYPE On Google gs101, the number of UTP transfer request slots (nutrs) is 32, and in this case the driver ends up programming the UTRL_NEXUS_TYPE incorrectly as 0. This is because the left hand side of the shift is 1, which is of type int, i.e. 31 bits wide. Shifting by more than that width results in undefined behaviour. Fix this by switching to the BIT() macro, which applies correct type casting as required. This ensures the correct value is written to UTRL_NEXUS_TYPE (0xffffffff on gs101), and it also fixes a UBSAN shift warning: UBSAN: shift-out-of-bounds in drivers/ufs/host/ufs-exynos.c:1113:21 shift exponent 32 is too large for 32-bit type 'int' For consistency, apply the same change to the nutmrs / UTMRL_NEXUS_TYPE write.
Title scsi: ufs: exynos: Fix programming of HCI_UTRL_NEXUS_TYPE
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-09-11T16:56:37.173Z

Reserved: 2025-04-16T07:20:57.131Z

Link: CVE-2025-39788

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2025-09-11T17:15:45.070

Modified: 2025-09-11T17:15:45.070

Link: CVE-2025-39788

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-09-11T00:00:00Z

Links: CVE-2025-39788 - Bugzilla