Answer in brief
CVE-2026-92521 records a Unknown severity vulnerability in ACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 <321bb0eb1486a0d575f02e24e3f4170e408c2f51 || >=db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 <3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2 || >=db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 <a285fa3780c768dcc51c76768707d099a2cc611d || >=db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 <6aaf6dbf54fdfae096f3f90a79e9614e46579280 || >=db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 <70cf773cca30a10b4964c24520a71279c974b899 || >=db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 <3eee4c21931dc048ce63b86809f04e4e6f0dcad5 || >=db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 <6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217 || >=db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 <8a742141f7ab84975aa758b775567ef4740ef0cf | 321bb0eb1486a0d575f02e24e3f4170e408c2f51, 3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2, a285fa3780c768dcc51c76768707d099a2cc611d, 6aaf6dbf54fdfae096f3f90a79e9614e46579280, 70cf773cca30a10b4964c24520a71279c974b899, 3eee4c21931dc048ce63b86809f04e4e6f0dcad5, 6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217, 8a742141f7ab84975aa758b775567ef4740ef0cf |
| Linux/Linuxgeneric | 2.6.28 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: ACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root acpi_pci_root_add() assigns the freshly allocated root to device->driver_data before dmar_device_add() and pci_acpi_scan_root(). Both failure paths reach the end: label where root is kfree()'d, but only the pci_acpi_scan_root() path clears driver_data first. When dmar_device_add() fails during a hot-add, root is freed while device->driver_data still points at it. The ACPI core does not clear driver_data on attach failure, so a later acpi_pci_find_root() call may dereference this dangling pointer. acpi_pci_root_remove() has the same problem: it frees root without clearing device->driver_data, leaving a dangling pointer behind after the root bridge is removed. Move the NULL assignment to the shared end: label so every error path in acpi_pci_root_add() clears driver_data before freeing root, and clear it in acpi_pci_root_remove() as well, so the object is never left reachable through driver_data after being freed.
Quoted source text, attributed separately from HOL analysis.