CVE-2025-39788

Advisory lineage Upstream: 0 Downstream: 45
Modified
Published: 11 Sept 2025, 16:56
Last modified:12 May 2026, 12:07

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

11 Sept 2025, 16:56
Published
Vulnerability first disclosed
12 May 2026, 12:07
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 7%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • debian•debian_linux

    11.0

  • linux•linux

    ≥ 55f4b1f73631a0817717fe6e98517de51b4c3527, < 01510a9e8222f11cce064410f3c2fcf0756c0a08 | ≥ 55f4b1f73631a0817717fe6e98517de51b4c3527, < 098b2c8ee208c77126839047b9e6e1925bb35baa | ≥ 55f4b1f73631a0817717fe6e98517de51b4c3527, < c1f025da8f370a015e412b55cbcc583f91de8316 | ≥ 55f4b1f73631a0817717fe6e98517de51b4c3527, < 6d53b2a134da77eb7fe65c5c7c7a3c193539a78a | ≥ 55f4b1f73631a0817717fe6e98517de51b4c3527, < dc8fb963742f1a38d284946638f9358bdaa0ddee | ≥ 55f4b1f73631a0817717fe6e98517de51b4c3527, < 5b9f1ef293428ea9c0871d96fcec2a87c4445832 | ≥ 55f4b1f73631a0817717fe6e98517de51b4c3527, < 01aad16c2257ab8ff33b152b972c9f2e1af47912 | 5.9

  • linux•linux_kernel

    ≥ 5.9, < 5.10.241 | ≥ 5.11, < 5.15.190 | ≥ 5.16, < 6.1.149 | ≥ 6.2, < 6.6.103 | ≥ 6.7, < 6.12.44 | ≥ 6.13, < 6.16.4

References (10)