Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected df542f669307918f054a17878ff6dd1ddbb2fe18 before 501baaeca7d128fa0a2f6953cf5873c5b0d7cf89; affected df542f669307918f054a17878ff6dd1ddbb2fe18 before 298673397ea3f6f5811b84f0d9f71eac71dda2e3; affected df542f669307918f054a17878ff6dd1ddbb2fe18 before 0a7822e34a0bfde31b194ac3da3253e5032b44cc |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.18.55 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.