CVE-2026-98131

In the Linux kernel, the following vulnerability has been resolved:

net: stmmac: fix dma mapping leak in stmmac tso xmit()

In stmmac tso xmit(), if the DMA mapping of an skb fragment fails, the frame is dropped but the DMA mappings already created for the linear part and for the fragments mapped before the failure are never unmapped, leaking DMA mappings.

Fix the leak by walking back over the descriptors used by the frame and releasing each of them with stmmac free tx buffer(). Moreover, release the descriptors with stmmac release tx desc() unmapping the DMA buffers.