CVE-2026-23453
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
In the Linux kernel, in the TI ICSSG PRUETH network driver, there is a memory leak in the XDP_DROP path 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, but this causes a memory leak when running XDP programs that drop packets in non-zero-copy mode (standard page pool mode). Pages are never returned to the page pool, leading to OOM conditions. The fix handles cleanup in the caller, emac_rx_packet(), which now recycles the page back to the page pool when emac_run_xdp() returns ICSSG_XDP_CONSUMED for XDP_DROP.
Risk Assessment
This vulnerability can lead to memory exhaustion (OOM) on systems using XDP programs that drop packets in non-zero-copy mode, potentially causing system crashes or denial of service (DoS).
Recommendation
Apply the Linux kernel patch that fixes this issue, or update the kernel to a version containing the fix.
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Original NVD description (English source)
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().