{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.8-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  ata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY  A user reported that commit 105c42566a55 (\"ata: ahci: force 32-bit DMA for JMicron JMB582/JMB585\") made the JMicron JMB585 unusable on his board.  The failure is seen as soon as the ahci driver is probed, and booting with iommu=off does not solve the problem.  Looking at the AHCI specification, PxCLBU and PxFBU are both read only '0' for HBAs that do not support 64-bit addressing.  For HBAs that do support 64-bit addressing, the registers are read write, with a reset value that is Implementation Specific.  When using the AHCI_HFLAG_32BIT_ONLY flag, the HBA does support 64-bit addressing, and a 32-bit DMA mask is set by simply clearing HOST_CAP_64. Thus, in this case, we need to explicitly clear the registers to 0.",
  "id": "DEBIAN-CVE-2026-98262",
  "modified": "2026-10-07T04:47:30.306682399Z",
  "published": "2026-10-06T09:18:15.347Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98262"
    }
  ],
  "upstream": [
    "CVE-2026-98262"
  ]
}