Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: xsk: honor XDP_TX_METADATA in zero-copy path The zero-copy path reads TX metadata whenever the UMEM has metadata space, even if the descriptor does not set XDP_TX_METADATA. Pass descriptor options through the metadata helpers and ignore metadata unless the option is set. This does not fix the existing per-WQE metadata handling for mlx5 MPWQEs. Only the descriptor that starts a session passes through xsk_tx_metadata_request() and configures offload state shared by the batch. Metadata on descriptors joining an open session is therefore not validated and does not configure its requested offloads. In addition, a non-NULL metadata pointer from such a descriptor is treated as a timestamp completion request even when XDP_TXMD_FLAGS_TIMESTAMP is not set, so its metadata union can be overwritten with an unrequested timestamp. Fixing mixed metadata states within one MPWQE requires a separate change.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 48eb03dd26304c24f03bdbb9382e89c8564e71df before 8ba0d143e471c85f8a116707c0b42bf046b0a7b3; affected 48eb03dd26304c24f03bdbb9382e89c8564e71df before 53a5b262d706b572840cbe8feae392538077ee19; affected 48eb03dd26304c24f03bdbb9382e89c8564e71df before bf9387488d6394845076928c6ca5315ce5d84f54; affected 48eb03dd26304c24f03bdbb9382e89c8564e71df before a6e4b9a6deb9362ef7a0706c70d674e92fe1411a |
| Linux / Linux | affected 6.8; unaffected 0 before 6.8; unaffected 6.12.114 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.