CVE-2026-31646

Description

In the Linux kernel, the following vulnerability has been resolved: net: lan966x: fix page_pool error handling in lan966x_fdma_rx_alloc_page_pool() page_pool_create() can return an ERR_PTR on failure. The return value is used unconditionally in the loop that follows, passing the error pointer through xdp_rxq_info_reg_mem_model() into page_pool_use_xdp_mem(), which dereferences it, causing a kernel oops. Add an IS_ERR check after page_pool_create() to return early on failure.

References

• https://git.kernel.org/stable/c/305832c53551cfbe6e5b81ca7ee765e60f4fe8e9
• https://git.kernel.org/stable/c/3fd0da4fd8851a7e62d009b7db6c4a05b092bc19
• https://git.kernel.org/stable/c/7caf90d9ab97951a58d1de85ab7e7d7cca7a4513
• https://git.kernel.org/stable/c/b5dcb41ba891b55157006cac79825c78a32b409e
• https://git.kernel.org/stable/c/e63265f188ea39dcf5f546770650027528f3bd0f