CVE-2024-50094 - "Philips SFC Linux Net Driver Unconditional XDP Flush Buffer Over-Write"

CVE ID : CVE-2024-50094
Published : Nov. 5, 2024, 5:15 p.m. | 24 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: sfc: Don't invoke xdp_do_flush() from netpoll. Yury reported a crash in the sfc driver originated from netpoll_send_udp(). The netconsole sends a message and then netpoll invokes the driver's NAPI function with a budget of zero. It is dedicated to allow driver to free TX resources, that it may have used while sending the packet. In the netpoll case the driver invokes xdp_do_flush() unconditionally, leading to crash because bpf_net_context was never assigned. Invoke xdp_do_flush() only if budget is not zero.
Severity: 0.0 | NA
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