medium5.5
CVE-2021-47560
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum: Protect driver from buggy firmware When processing port up/down events gen…
Impact
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum: Protect driver from buggy firmware When processing port up/down events generated by the device's firmware, the driver protects itself from events reported for non-existent local ports, but not the CPU port (local port 0), which exists, but lacks a netdev. This can result in a NULL pointer dereference when calling netif_carrier_{on,off}(). Fix this by bailing early when processing an event reported for the CPU port. Problem was only observed when running on top of a buggy emulator.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 5.4 before 5.10.83 from 5.11 before 5.15.6 Version 5.16 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047
- https://git.kernel.org/stable/c/90d0736876c50ecde1a3275636a06b9ddb1cace9
- https://git.kernel.org/stable/c/da4d70199e5d82da664a80077508d6c18f5e76df
- https://git.kernel.org/stable/c/63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047
- https://git.kernel.org/stable/c/90d0736876c50ecde1a3275636a06b9ddb1cace9
- https://git.kernel.org/stable/c/da4d70199e5d82da664a80077508d6c18f5e76df