{"id":"CVE-2026-90086","published":"2026-09-17T17:16:58.637","lastModified":"2026-09-17T17:16:58.637","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: honor XDP_TX_METADATA in zero-copy path\n\nThe zero-copy path reads TX metadata whenever the UMEM has metadata space,\neven if the descriptor does not set XDP_TX_METADATA. Pass descriptor\noptions through the metadata helpers and ignore metadata unless the option\nis set.\n\nThis does not fix the existing per-WQE metadata handling for mlx5 MPWQEs.\nOnly the descriptor that starts a session passes through\nxsk_tx_metadata_request() and configures offload state shared by the batch.\nMetadata on descriptors joining an open session is therefore not validated\nand does not configure its requested offloads. In addition, a non-NULL\nmetadata pointer from such a descriptor is treated as a timestamp\ncompletion request even when XDP_TXMD_FLAGS_TIMESTAMP is not set, so its\nmetadata union can be overwritten with an unrequested timestamp. Fixing\nmixed metadata states within one MPWQE requires a separate change.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/53a5b262d706b572840cbe8feae392538077ee19","tags":[]},{"url":"https://git.kernel.org/stable/c/a6e4b9a6deb9362ef7a0706c70d674e92fe1411a","tags":[]},{"url":"https://git.kernel.org/stable/c/bf9387488d6394845076928c6ca5315ce5d84f54","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}