CVE-2026-98545 (GCVE-0-2026-98545)
Vulnerability from cvelistv5
Published
2026-10-18 15:18
Modified
2026-10-19 09:21
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ata: libata-scsi: bound the ATA passthru sense descriptor writes When an ATA PASS-THROUGH command to an ATAPI device fails, the sense buffer holds the device's REQUEST SENSE reply, and ata_scsi_set_passthru_sense_fields() trusts its additional length byte, sb[7], when adding the ATA Status Return descriptor. A faulty or malicious device can use that to make the kernel read and write past the 96-byte buffer in three ways: - scsi_sense_desc_find() is passed sb[7] + 8 as the buffer length, so its clamp against sb[7] does nothing and the walk runs off the end. - A type-9 descriptor found near the end is filled in unchecked. - A new descriptor at sb[8 + len] needs len + 22 bytes, not len + 14, so len 75..82 writes up to 8 bytes past the end. Reproduced with KASAN under qemu, with the emulated ATAPI REQUEST SENSE reply patched: BUG: KASAN: slab-out-of-bounds in scsi_sense_desc_find+0x1a5/0x210 BUG: KASAN: slab-out-of-bounds in ata_scsi_qc_complete+0x1a15/0x1a50 Both are gone with this patch, and a valid descriptor is still filled in.
References
Impacted products
Vendor Product Version
Linux Linux Version: ce477199c53e3db5a096981c565e232498ddeae4
Version: 97981926224afe17ba3e22e0c2b7dd8b516ee574
Version: 97981926224afe17ba3e22e0c2b7dd8b516ee574
Version: 97981926224afe17ba3e22e0c2b7dd8b516ee574
Version: 97981926224afe17ba3e22e0c2b7dd8b516ee574
Version: 67d9d0b6ae4aaf2c4cef103a96a145c7fdfb15f8
Version: 6.6.44   ≤
Version: 6.10.3   ≤
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{
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        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "drivers/ata/libata-scsi.c"
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          "programFiles": [
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          "vendor": "Linux",
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      "cpeApplicability": [
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          "nodes": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nata: libata-scsi: bound the ATA passthru sense descriptor writes\n\nWhen an ATA PASS-THROUGH command to an ATAPI device fails, the sense\nbuffer holds the device\u0027s REQUEST SENSE reply, and\nata_scsi_set_passthru_sense_fields() trusts its additional length\nbyte, sb[7], when adding the ATA Status Return descriptor.  A faulty\nor malicious device can use that to make the kernel read and write\npast the 96-byte buffer in three ways:\n\n- scsi_sense_desc_find() is passed sb[7] + 8 as the buffer length, so\n  its clamp against sb[7] does nothing and the walk runs off the end.\n- A type-9 descriptor found near the end is filled in unchecked.\n- A new descriptor at sb[8 + len] needs len + 22 bytes, not len + 14,\n  so len 75..82 writes up to 8 bytes past the end.\n\nReproduced with KASAN under qemu, with the emulated ATAPI REQUEST SENSE\nreply patched:\n\n  BUG: KASAN: slab-out-of-bounds in scsi_sense_desc_find+0x1a5/0x210\n  BUG: KASAN: slab-out-of-bounds in ata_scsi_qc_complete+0x1a15/0x1a50\n\nBoth are gone with this patch, and a valid descriptor is still filled\nin."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:21:28.453Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c698f6deabf680f8f4a1727ef2dc80fe78815fbf"
        },
        {
          "url": "https://git.kernel.org/stable/c/d9a7147b93624660626cd7c3b1143715699e1f5c"
        },
        {
          "url": "https://git.kernel.org/stable/c/1603abb0c50420e97cf4a1feddbd5e183c5fdf86"
        },
        {
          "url": "https://git.kernel.org/stable/c/80fbb0bc4d11683c88f2f9d3997ea02fcada5408"
        },
        {
          "url": "https://git.kernel.org/stable/c/80320b278fea07ffcda3f57b67b61658e0a4e1ca"
        }
      ],
      "title": "ata: libata-scsi: bound the ATA passthru sense descriptor writes",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98545",
    "datePublished": "2026-10-18T15:18:13.949Z",
    "dateReserved": "2026-09-25T10:25:14.356Z",
    "dateUpdated": "2026-10-19T09:21:28.453Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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