CVE-2026-98634 (GCVE-0-2026-98634)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:20 – Updated: 2026-10-19 09:23
VLAI
Title
scsi: sd_zbc: Reject disks with too many zones
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: sd_zbc: Reject disks with too many zones sd_zbc_read_zones() computes the number of zones with 64-bit arithmetic and stores the result in the unsigned int nr_zones field of struct zoned_disk_info, silently truncating counts that exceed 32 bits. The truncated count is later used to size per-zone resources, while the device may still report more zones than fit. Moreover, sd_zbc_report_zones() counts the reported zones with a signed int zone_idx, which overflows past INT_MAX. Reject devices reporting more than INT_MAX zones at scan time; such a device is not realistic for any medium that exists today, and accepting it produces inconsistent zone bookkeeping.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7063 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 89d9475610771b5e5fe1879075f0fc9ba6e3755f , < d8791ae55d85dfaeafa20ea48365482a0cc5a107 (git)
Affected: 89d9475610771b5e5fe1879075f0fc9ba6e3755f , < 0af16d8be3ec7ff28bb56a0da79c9aed66ac2c3b (git)
Affected: 89d9475610771b5e5fe1879075f0fc9ba6e3755f , < 3ddf8383b54456f19fd73d3cebed81bd250c7388 (git)
Affected: 89d9475610771b5e5fe1879075f0fc9ba6e3755f , < b6ec0f79745967c751c85df373062c8d15e45fc4 (git)
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Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.55 , ≤ 6.18.* (semver)
Unaffected: 7.2.9 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/sd_zbc.c"
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              "operator": "OR"
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          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:23:03.375Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "scsi: sd_zbc: Reject disks with too many zones",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    "datePublished": "2026-10-18T15:20:03.198Z",
    "dateReserved": "2026-09-25T10:25:14.361Z",
    "dateUpdated": "2026-10-19T09:23:03.375Z",
    "state": "PUBLISHED"
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      "date": "2026-10-26",
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      "percentile": "0.05986"
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          }
        ],
        "id": "CVE-2026-98634",
        "lastModified": "2026-10-19T10:19:27.657",
        "metrics": {},
        "published": "2026-10-18T16:17:16.507",
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      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-98634.json",
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  }
}



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