Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 before 321bb0eb1486a0d575f02e24e3f4170e408c2f51; affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 before 3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2; affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 before a285fa3780c768dcc51c76768707d099a2cc611d; affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 before 6aaf6dbf54fdfae096f3f90a79e9614e46579280; affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 before 70cf773cca30a10b4964c24520a71279c974b899; affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 before 3eee4c21931dc048ce63b86809f04e4e6f0dcad5; affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 before 6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217; affected db89b4f0dbab837d0f3de2c3e9427a8d5393afa3 before 8a742141f7ab84975aa758b775567ef4740ef0cf |
| Linux / Linux | affected 2.6.28; unaffected 0 before 2.6.28; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/321bb0eb1486a0d575f02e24e3f4170e408c2f51
- https://git.kernel.org/stable/c/3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2
- https://git.kernel.org/stable/c/a285fa3780c768dcc51c76768707d099a2cc611d
- https://git.kernel.org/stable/c/6aaf6dbf54fdfae096f3f90a79e9614e46579280
- https://git.kernel.org/stable/c/70cf773cca30a10b4964c24520a71279c974b899
- https://git.kernel.org/stable/c/3eee4c21931dc048ce63b86809f04e4e6f0dcad5
- https://git.kernel.org/stable/c/6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217
- https://git.kernel.org/stable/c/8a742141f7ab84975aa758b775567ef4740ef0cf