{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c"
            },
            {
              "fixed": "0191c9ff23ef1678dbfb5ad253a2dee92feb5d71"
            },
            {
              "fixed": "8f510f68208a1f673d7c7234a687be4671490e9c"
            },
            {
              "fixed": "4719424bb7cb9f20b73986bcb72dd528f0e5c6eb"
            },
            {
              "fixed": "a5a8b4737f68bbac8aa0685af0c8921e6003c22b"
            },
            {
              "fixed": "b28a17d4a9bb0aa38b48681c3927b012ba40eabe"
            },
            {
              "fixed": "b691a3e244278362e552439d6d3ee5a5d3703488"
            },
            {
              "fixed": "7912ad8fb5233bb8cfe21d50df639c7f4854ff9d"
            },
            {
              "fixed": "82e47533221d4746947b74d2e79a478c36c6433a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.22"
            },
            {
              "fixed": "5.10.271"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.222"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.54"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98262.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY\n\nA user reported that commit 105c42566a55 (\"ata: ahci: force 32-bit DMA for\nJMicron JMB582/JMB585\") made the JMicron JMB585 unusable on his board.\n\nThe failure is seen as soon as the ahci driver is probed, and booting with\niommu=off does not solve the problem.\n\nLooking at the AHCI specification, PxCLBU and PxFBU are both read only '0'\nfor HBAs that do not support 64-bit addressing.\n\nFor HBAs that do support 64-bit addressing, the registers are read write,\nwith a reset value that is Implementation Specific.\n\nWhen using the AHCI_HFLAG_32BIT_ONLY flag, the HBA does support 64-bit\naddressing, and a 32-bit DMA mask is set by simply clearing HOST_CAP_64.\nThus, in this case, we need to explicitly clear the registers to 0.",
  "id": "CVE-2026-98262",
  "modified": "2026-10-08T02:30:22.193006614Z",
  "published": "2026-10-06T08:45:26.118Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0191c9ff23ef1678dbfb5ad253a2dee92feb5d71"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4719424bb7cb9f20b73986bcb72dd528f0e5c6eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7912ad8fb5233bb8cfe21d50df639c7f4854ff9d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82e47533221d4746947b74d2e79a478c36c6433a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f510f68208a1f673d7c7234a687be4671490e9c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a5a8b4737f68bbac8aa0685af0c8921e6003c22b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b28a17d4a9bb0aa38b48681c3927b012ba40eabe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b691a3e244278362e552439d6d3ee5a5d3703488"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98262.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98262"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY"
}