CVE-2026-46273

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ibmveth: Disable GSO for packets with small MSS<br /> <br /> Some physical adapters on Power systems do not support segmentation<br /> offload when the MSS is less than 224 bytes. Attempting to send such<br /> packets causes the adapter to freeze, stopping all traffic until<br /> manually reset.<br /> <br /> Implement ndo_features_check to disable GSO for packets with small MSS<br /> values. The network stack will perform software segmentation instead.<br /> <br /> The 224-byte minimum matches ibmvnic<br /> commit ("ibmvnic: Enforce stronger sanity checks<br /> on GSO packets")<br /> which uses the same physical adapters in SEA configurations.<br /> <br /> The issue occurs specifically when the hardware attempts to perform<br /> segmentation (gso_segs &gt; 1) with a small MSS. Single-segment GSO packets<br /> (gso_segs == 1) do not trigger the problematic LSO code path and are<br /> transmitted normally without segmentation.<br /> <br /> Add an ndo_features_check callback to disable GSO when MSS