{
  "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": "7.1.13-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  usb: xhci: bail out of setup if the controller is inaccessible  xhci_gen_setup() locates the operational registers using the capability length read from the very first register:  \txhci-\u003eop_regs = hcd-\u003eregs + \t\tHC_LENGTH(readl(\u0026xhci-\u003ecap_regs-\u003ehc_capbase));  If the controller is dead or has dropped off the bus, that read returns ~0, HC_LENGTH() truncates it to 0xff, and op_regs ends up 0xff bytes past the page-aligned MMIO base, i.e. unaligned. The first access through it, xhci_halt() -\u003e xhci_handshake() reading op_regs-\u003estatus, is then an unaligned readl() on device memory. arm64 faults on unaligned device accesses, so instead of xhci_handshake() catching the all-ones value and returning -ENODEV, setup oopses:    xhci-pci-renesas 0005:08:00.0: Unable to change power state from D3cold to D0, device inaccessible   xhci-pci-renesas 0005:08:00.0: xHCI Host Controller   xhci-pci-renesas 0005:08:00.0: new USB bus registered, assigned bus number 1   Unable to handle kernel paging request at virtual address ffff80030a770103     ESR = 0x0000000096000021     FSC = 0x21: alignment fault   Internal error: Oops: 0000000096000021 [#1]  SMP   pc : xhci_halt [xhci_hcd]   Call trace:    xhci_halt    xhci_gen_setup    xhci_pci_setup    usb_add_hcd    usb_hcd_pci_probe    xhci_pci_common_probe    xhci_pci_renesas_probe  This was hit with a Renesas uPD720201 that failed to power up (\"Unable to change power state from D3cold to D0, device inaccessible\") yet still reached the HCD probe path.  Read the capability register once, and if it reads back the all-ones value (as xhci_handshake() and xhci_reset() already test for), abort setup with -ENODEV before op_regs is derived from it. Reading it once also avoids re-reading a register that may change under a concurrent hot-removal.",
  "id": "DEBIAN-CVE-2026-80861",
  "modified": "2026-09-12T08:47:18.550650310Z",
  "published": "2026-09-04T16:18:15.290Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-80861"
    }
  ],
  "upstream": [
    "CVE-2026-80861"
  ]
}