{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "89d9475610771b5e5fe1879075f0fc9ba6e3755f"
            },
            {
              "fixed": "d8791ae55d85dfaeafa20ea48365482a0cc5a107"
            },
            {
              "fixed": "0af16d8be3ec7ff28bb56a0da79c9aed66ac2c3b"
            },
            {
              "fixed": "3ddf8383b54456f19fd73d3cebed81bd250c7388"
            },
            {
              "fixed": "b6ec0f79745967c751c85df373062c8d15e45fc4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.10.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98634.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: sd_zbc: Reject disks with too many zones\n\nsd_zbc_read_zones() computes the number of zones with 64-bit arithmetic and\nstores the result in the unsigned int nr_zones field of struct\nzoned_disk_info, silently truncating counts that exceed 32 bits. The\ntruncated count is later used to size per-zone resources, while the device\nmay still report more zones than fit.\n\nMoreover, sd_zbc_report_zones() counts the reported zones with a signed int\nzone_idx, which overflows past INT_MAX. Reject devices reporting more than\nINT_MAX zones at scan time; such a device is not realistic for any medium\nthat exists today, and accepting it produces inconsistent zone bookkeeping.",
  "id": "CVE-2026-98634",
  "modified": "2026-10-19T02:31:00.833083116Z",
  "published": "2026-10-18T15:20:03.198Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0af16d8be3ec7ff28bb56a0da79c9aed66ac2c3b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ddf8383b54456f19fd73d3cebed81bd250c7388"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b6ec0f79745967c751c85df373062c8d15e45fc4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d8791ae55d85dfaeafa20ea48365482a0cc5a107"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98634.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98634"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "scsi: sd_zbc: Reject disks with too many zones"
}