scsi: ufs: core: Validate string descriptors

{
  "id": "278310d06c55492b1c990507a05afb18fdffa0f0f6a6529bfcfa821618806d08",
  "url": "https://osv.dev/vulnerability/CVE-2026-92480",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "scsi: ufs: core: Validate string descriptors",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Validate string descriptors The string descriptor length includes a two-byte header while the UTF-16 payload starts after it. utf16s_to_utf8s() expects a count of UTF-16 code units, not bytes. Passing the payload byte count can make it read beyond the descriptor buffer. Validate that the payload has an even byte count, pass a code-unit count to the converter, and allocate sufficient UTF-8 output space. The raw string buffer starts after the descriptor header but its size is bLength. Copying bLength bytes from that pointer can read beyond the response buffer. Allocate a zeroed bLength-sized buffer and copy only the UTF-16 payload. This preserves the raw buffer size consumed by the RPMB device-ID ABI while avoiding the overread.",
    "evidence": "osv:CVE-2026-92480",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.191",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.160",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.57",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-92480",
      "aliases": [
        "CVE-2026-92480"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4b828fe156a662a4b6135019bf077040340f299b"
                },
                {
                  "fixed": "22c076f72ad67d89dab58d9c97a17c33e8130e82"
                },
                {
                  "fixed": "566109f1ee4e389b4effab43b0ce1fdab302e9de"
                },
                {
                  "fixed": "02dd1a65dff842d9360a38ebe243dc8f6adbbaf5"
                },
                {
                  "fixed": "f3480c59f4ce97d831e9d06f5a2b9c20547ed1a4"
                },
                {
                  "fixed": "66da25277256b6bf4c3fdbf3c9bfd43324c9cf25"
                },
                {
                  "fixed": "d96e83d028d7d8762e424e49c671d49ac2ecf14f"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92480.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.4.0"
                },
                {
                  "fixed": "6.1.191"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.160"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.114"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.57"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92480.json"
          }
        }
      ],
      "modified": "2026-11-01T02:30:51.597256574Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/02dd1a65dff842d9360a38ebe243dc8f6adbbaf5",
        "https://git.kernel.org/stable/c/22c076f72ad67d89dab58d9c97a17c33e8130e82",
        "https://git.kernel.org/stable/c/566109f1ee4e389b4effab43b0ce1fdab302e9de",
        "https://git.kernel.org/stable/c/66da25277256b6bf4c3fdbf3c9bfd43324c9cf25",
        "https://git.kernel.org/stable/c/d96e83d028d7d8762e424e49c671d49ac2ecf14f",
        "https://git.kernel.org/stable/c/f3480c59f4ce97d831e9d06f5a2b9c20547ed1a4",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92480.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-92480",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92480.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-92480",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521348,
  "published_at": "2026-09-17T16:09:57.719+00:00"
}