CVE-2024-50094
sfc: Don't invoke xdp_do_flush() from netpoll.
Reported by linux · Published November 5, 2024
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| linux_kernel | linux | 6.11.4 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 401cb7dae8130fd34eb84648e02ab4c506df7d5e, 401cb7dae8130fd34eb84648e02ab4c506df7d5e |
| Linux | Linux | 6.11, 0, 6.11.4 |
| linux | linux_kernel | 6.11, 6.11 |
| Linux | Linux | 401cb7dae8130fd34eb84648e02ab4c506df7d5e, 401cb7dae8130fd34eb84648e02ab4c506df7d5e, 0 |
Timeline
- Nov 5, 2024 CVE Published
- Nov 6, 2024 EPSS Score (30 in total, the first dated here)
- Nov 6, 2024 Coalition ESS Score (8 in total, the first dated here)
- Jan 2, 2026 Security Advisory (156 in total, the first dated here)
- Apr 29, 2026 Distribution Patch (115 in total, the first dated here)
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