CVE-2025-39788

HIGH EPSS 5.1%
Published Sep 11, 20259mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Sep 11, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
5.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel*≥5.9  –  <5.10.241
linuxlinux_kernel*≥5.11  –  <5.15.190
linuxlinux_kernel*≥5.16  –  <6.1.149
linuxlinux_kernel*≥6.2  –  <6.6.103
linuxlinux_kernel*≥6.7  –  <6.12.44
linuxlinux_kernel*≥6.13  –  <6.16.4
debiandebian_linux11.0any

References 10

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-032379.html
  • git.kernel.org https://git.kernel.org/stable/c/01510a9e8222f11cce064410f3c2fcf0756c0a08
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/01aad16c2257ab8ff33b152b972c9f2e1af47912
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/098b2c8ee208c77126839047b9e6e1925bb35baa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5b9f1ef293428ea9c0871d96fcec2a87c4445832
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6d53b2a134da77eb7fe65c5c7c7a3c193539a78a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c1f025da8f370a015e412b55cbcc583f91de8316
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dc8fb963742f1a38d284946638f9358bdaa0ddee
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Third Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/01510a9e8222f11cce064410f3c2fcf0756c0a08
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/01aad16c2257ab8ff33b152b972c9f2e1af47912
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/098b2c8ee208c77126839047b9e6e1925bb35baa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5b9f1ef293428ea9c0871d96fcec2a87c4445832
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6d53b2a134da77eb7fe65c5c7c7a3c193539a78a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c1f025da8f370a015e412b55cbcc583f91de8316
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dc8fb963742f1a38d284946638f9358bdaa0ddee
    Patch