Answer in brief
CVE-2026-80861 records a Unknown severity vulnerability in usb: xhci: bail out of setup if the controller is inaccessible. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <301f4a3303b21ea959a8294518ee883710498ac2 || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <70706dbcf122940f4e3595d7ba1445004cc00074 || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <c051f66b621695ad7c8438a9497d79e1f4f05edb || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <bf84c6b0264947794fa783c324a6d874ca6657d8 || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <0b31744f70c5e06cce5fb660e02d057a3b9e0e37 || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <78203d5b54a40f0e36196ebf31c9c7a380fc8811 | 301f4a3303b21ea959a8294518ee883710498ac2, 70706dbcf122940f4e3595d7ba1445004cc00074, c051f66b621695ad7c8438a9497d79e1f4f05edb, bf84c6b0264947794fa783c324a6d874ca6657d8, 0b31744f70c5e06cce5fb660e02d057a3b9e0e37, 78203d5b54a40f0e36196ebf31c9c7a380fc8811 |
| Linux/Linuxgeneric | 2.6.31 | Not reported |
| Linux/Linuxgeneric | >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <bf84c6b0264947794fa783c324a6d874ca6657d8 || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <0b31744f70c5e06cce5fb660e02d057a3b9e0e37 || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <78203d5b54a40f0e36196ebf31c9c7a380fc8811 | bf84c6b0264947794fa783c324a6d874ca6657d8, 0b31744f70c5e06cce5fb660e02d057a3b9e0e37, 78203d5b54a40f0e36196ebf31c9c7a380fc8811 |
| Linux/Linuxgeneric | >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <c051f66b621695ad7c8438a9497d79e1f4f05edb || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <bf84c6b0264947794fa783c324a6d874ca6657d8 || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <0b31744f70c5e06cce5fb660e02d057a3b9e0e37 || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <78203d5b54a40f0e36196ebf31c9c7a380fc8811 | c051f66b621695ad7c8438a9497d79e1f4f05edb, bf84c6b0264947794fa783c324a6d874ca6657d8, 0b31744f70c5e06cce5fb660e02d057a3b9e0e37, 78203d5b54a40f0e36196ebf31c9c7a380fc8811 |
| Linux/Linuxgeneric | >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <70706dbcf122940f4e3595d7ba1445004cc00074 || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <c051f66b621695ad7c8438a9497d79e1f4f05edb || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <bf84c6b0264947794fa783c324a6d874ca6657d8 || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <0b31744f70c5e06cce5fb660e02d057a3b9e0e37 || >=66d4eadd8d067269ea8fead1a50fe87c2979a80d <78203d5b54a40f0e36196ebf31c9c7a380fc8811 | 70706dbcf122940f4e3595d7ba1445004cc00074, c051f66b621695ad7c8438a9497d79e1f4f05edb, bf84c6b0264947794fa783c324a6d874ca6657d8, 0b31744f70c5e06cce5fb660e02d057a3b9e0e37, 78203d5b54a40f0e36196ebf31c9c7a380fc8811 |
Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 4, 2026
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: xhci->op_regs = hcd->regs + HC_LENGTH(readl(&xhci->cap_regs->hc_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() -> xhci_handshake() reading op_regs->status, 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.
Quoted source text, attributed separately from HOL analysis.