Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: cortina: Make RX SKB per-port
The SKB used to assemble packets from fragments in gmac_rx() is static local, but the Gemini has two ethernet ports, meaning there can be races between the ports on a bad day if a device is using both.
Make the RX SKB a per-port variable and carry it over between invocations in the port struct instead.
Zero the pointer once we call napi_gro_frags(), on error (after calling napi_free_frags()) or if the port is stopped.
Zero it in some place where not strictly necessary just to emphasize what is going on.
This was found by Sashiko during normal patch review.
Details
- Affected product:
- Ubuntu 20.04 ELS
- Affected packages:
- linux-meta @ 5.4.0 (+1 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| Debian 12 | Planned | — |
| Ubuntu 22.04 | Planned | — |