CVE-2025-39788 (GCVE-0-2025-39788)

Vulnerability from cvelistv5 – Published: 2025-09-11 16:56 – Updated: 2026-05-12 12:07
VLAI
Title
scsi: ufs: exynos: Fix programming of HCI_UTRL_NEXUS_TYPE
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6992 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 55f4b1f73631a0817717fe6e98517de51b4c3527 , < 01510a9e8222f11cce064410f3c2fcf0756c0a08 (git)
Affected: 55f4b1f73631a0817717fe6e98517de51b4c3527 , < 098b2c8ee208c77126839047b9e6e1925bb35baa (git)
Affected: 55f4b1f73631a0817717fe6e98517de51b4c3527 , < c1f025da8f370a015e412b55cbcc583f91de8316 (git)
Affected: 55f4b1f73631a0817717fe6e98517de51b4c3527 , < 6d53b2a134da77eb7fe65c5c7c7a3c193539a78a (git)
Affected: 55f4b1f73631a0817717fe6e98517de51b4c3527 , < dc8fb963742f1a38d284946638f9358bdaa0ddee (git)
Affected: 55f4b1f73631a0817717fe6e98517de51b4c3527 , < 5b9f1ef293428ea9c0871d96fcec2a87c4445832 (git)
Affected: 55f4b1f73631a0817717fe6e98517de51b4c3527 , < 01aad16c2257ab8ff33b152b972c9f2e1af47912 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.190 , ≤ 5.15.* (semver)
Unaffected: 6.1.149 , ≤ 6.1.* (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.44 , ≤ 6.12.* (semver)
Unaffected: 6.16.4 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC CN 4100 Affected: 0 , < V5.0 (custom)
guessed Create a notification for this product.
Show details on NVD website
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            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nscsi: ufs: exynos: Correcci\u00f3n de la programaci\u00f3n de HCI_UTRL_NEXUS_TYPE\n\nEn Google gs101, el n\u00famero de ranuras de solicitud de transferencia UTP (nutrs) es 32, y en este caso el controlador termina programando el UTRL_NEXUS_TYPE incorrectamente como 0.\n\nEsto se debe a que el lado izquierdo del desplazamiento es 1, que es de tipo int, es decir, de 31 bits de ancho. Desplazar por m\u00e1s de ese ancho resulta en comportamiento indefinido.\n\nSolucione esto cambiando a la macro BIT(), que aplica la conversi\u00f3n de tipo correcta seg\u00fan sea necesario. Esto asegura que el valor correcto se escriba en UTRL_NEXUS_TYPE (0xffffffff en gs101), y tambi\u00e9n corrige una advertencia de desplazamiento de UBSAN:\n\n    UBSAN: desplazamiento fuera de l\u00edmites en drivers/ufs/host/ufs-exynos.c:1113:21 el exponente de desplazamiento 32 es demasiado grande para el tipo \u0027int\u0027 de 32 bits\n\nPara mantener la coherencia, aplique el mismo cambio a la escritura de nutmrs / UTMRL_NEXUS_TYPE."
          }
        ],
        "id": "CVE-2025-39788",
        "lastModified": "2026-10-19T21:10:00.160",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-09-11T17:15:45.070",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/01510a9e8222f11cce064410f3c2fcf0756c0a08"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/01aad16c2257ab8ff33b152b972c9f2e1af47912"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/098b2c8ee208c77126839047b9e6e1925bb35baa"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5b9f1ef293428ea9c0871d96fcec2a87c4445832"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/6d53b2a134da77eb7fe65c5c7c7a3c193539a78a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/c1f025da8f370a015e412b55cbcc583f91de8316"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/dc8fb963742f1a38d284946638f9358bdaa0ddee"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          },
          {
            "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:13:36+00:00",
      "cve": "CVE-2025-39788",
      "id": "CVE-2025-39788",
      "initial_release_date": "2025-09-11T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: scsi: ufs: exynos: Fix programming of HCI_UTRL_NEXUS_TYPE",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39788.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-15T16:33:06Z",
      "cve": "CVE-2025-39788",
      "id": "CVE-2025-39788",
      "initial_release_date": "2025-09-11T23:23:42Z",
      "product_status:known_affected": "524",
      "product_status:known_not_affected": "267",
      "product_status:recommended": "495",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-39788",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2025/cve-2025-39788.json",
      "version": "45"
    }
  }
}



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