{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8fe55ef23387ce3c7488375b1fd539420d7654bb"
            },
            {
              "fixed": "5e52eb0290f66ba0732956dcb1e365b5ca3c5108"
            },
            {
              "fixed": "baf9b0383ff770fdff123d3a832f3a99641d96dd"
            },
            {
              "fixed": "8d08713ec83a18526d1ed1fd5f0d2b901d103a10"
            },
            {
              "fixed": "74456843f18ba7f3045974d7e8b88ab993152b8c"
            },
            {
              "fixed": "0c55707bd5d0d7670704cfd0dda933809b052f67"
            },
            {
              "fixed": "a199293f3038db8d31d47aa60f1e18272cd82354"
            },
            {
              "fixed": "0916948026f623844acd08888f7cbedbf1c48d6b"
            },
            {
              "fixed": "008cb88edb41f3c7c8e0ed763ff9f26719830984"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0b5877a1aeacdbf32b3bea91326592004ec7806f"
            },
            {
              "last_affected": "a037ebbe72a4f98495b193112e2b2000e5e09eb5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.12.19"
            },
            {
              "fixed": "5.13"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.13.4"
            },
            {
              "fixed": "5.14"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.14.0"
            },
            {
              "fixed": "5.15.218"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.185"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.154"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.106"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.47"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.11"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "7.2.0"
            },
            {
              "fixed": "7.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80917.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems\n\nOn 32-bit systems the config space is too large to ioremap in one go, so\npci_ecam_create() maps each bus segment separately and relies on the\n-\u003eadd_bus callback (pci_ecam_add_bus) to populate the per-bus mapping in\ncfg-\u003ewinp[]. pci_ecam_map_bus() then uses that mapping as the base for\nevery config access.\n\nThe generic ECAM ops (pci_generic_ecam_ops) already provide the -\u003eadd_bus\nand -\u003eremove_bus callbacks, but the CAM (legacy) ops in pci-host-generic.c\ndo not. As a result, on a 32-bit host using \"pci-host-cam-generic\" the\nper-bus mapping is never set up and the first config read dereferences a\nNULL base, crashing during bus enumeration:\n\n Unable to handle kernel NULL pointer dereference at virtual address 00000800\n Oops [#1]\n CPU: 0 PID: 1 Comm: swapper Not tainted 6.9.7+ #43\n Hardware name: Digilent Nexys-Video-A7 RV32 (DT)\n epc : pci_generic_config_read+0x40/0xb0\n  ra : pci_generic_config_read+0x2c/0xb0\n [\u003cc038db9c\u003e] pci_generic_config_read+0x40/0xb0\n [\u003cc038da04\u003e] pci_bus_read_config_dword+0x50/0xb0\n [\u003cc0391e94\u003e] pci_bus_generic_read_dev_vendor_id+0x3c/0x1ec\n [\u003cc039245c\u003e] pci_scan_single_device+0xa4/0x11c\n [\u003cc0392570\u003e] pci_scan_slot+0x9c/0x23c\n [\u003cc039388c\u003e] pci_scan_child_bus_extend+0x58/0x2f4\n [\u003cc0393db0\u003e] pci_scan_root_bus_bridge+0x64/0xe8\n [\u003cc0393e54\u003e] pci_host_probe+0x20/0xc8\n [\u003cc03bc6f4\u003e] pci_host_common_probe+0x144/0x1e4\n\nFix this by giving the CAM ops the same -\u003eadd_bus/-\u003eremove_bus callbacks.\nSince pci_ecam_add_bus() and pci_ecam_remove_bus() are static to ecam.c,\nmove the CAM ops definition there as pci_generic_cam_ops (mirroring\npci_generic_ecam_ops) and export it for pci-host-generic.c to reference.\n\n[mani: removed timestamp from log]",
  "id": "CVE-2026-80917",
  "modified": "2026-09-11T03:30:48.400548458Z",
  "published": "2026-09-09T16:13:15.202Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/008cb88edb41f3c7c8e0ed763ff9f26719830984"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0916948026f623844acd08888f7cbedbf1c48d6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c55707bd5d0d7670704cfd0dda933809b052f67"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e52eb0290f66ba0732956dcb1e365b5ca3c5108"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74456843f18ba7f3045974d7e8b88ab993152b8c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d08713ec83a18526d1ed1fd5f0d2b901d103a10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a199293f3038db8d31d47aa60f1e18272cd82354"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/baf9b0383ff770fdff123d3a832f3a99641d96dd"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80917.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80917"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems"
}