EUVD-2026-18706
GHSA-h255-j2q2-5hrg
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3Description
In the Linux kernel, the following vulnerability has been resolved: net: ti: icssg-prueth: Fix memory leak in XDP_DROP for non-zero-copy mode Page recycling was removed from the XDP_DROP path in emac_run_xdp() to avoid conflicts with AF_XDP zero-copy mode, which uses xsk_buff_free() instead. However, this causes a memory leak when running XDP programs that drop packets in non-zero-copy mode (standard page pool mode). The pages are never returned to the page pool, leading to OOM conditions. Fix this by handling cleanup in the caller, emac_rx_packet(). When emac_run_xdp() returns ICSSG_XDP_CONSUMED for XDP_DROP, the caller now recycles the page back to the page pool. The zero-copy path, emac_rx_packet_zc() already handles cleanup correctly with xsk_buff_free().
Analysis
Memory leak in Linux kernel's TI ICSSG PRU Ethernet driver XDP_DROP path causes page pool exhaustion and out-of-memory conditions on systems using XDP packet dropping in non-zero-copy mode. The vulnerability affects all Linux kernel versions with the vulnerable icssg-prueth driver code; page recycling was incorrectly removed from the XDP_DROP handler to support AF_XDP zero-copy mode, but this created a resource leak in standard mode. …
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