CVE-2026-98571net: stmmac: clear stale buf->page after recycling on skb build failure

Official description

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: clear stale buf->page after recycling on skb build failure In stmmac_rx(), when napi_build_skb() fails the descriptor page is recycled back to the page pool with page_pool_recycle_direct(), but buf->page is left pointing at the recycled page, unlike every other consumption site in the function which clears the pointer after handing the page away. With the stale pointer stmmac_rx_refill() skips the replacement allocation and programs the already-recycled page back into the RX descriptor. Clear buf->page on the napi_build_skb() failure path to keep the buffer lifecycle consistent with the other consumption sites.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/501baaeca7d128fa0a2f6953cf5873c5b0d7cf89
• https://git.kernel.org/stable/c/298673397ea3f6f5811b84f0d9f71eac71dda2e3
• https://git.kernel.org/stable/c/0a7822e34a0bfde31b194ac3da3253e5032b44cc