Description
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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 48eb03dd26304c24f03bdbb9382e89c8564e71df, < 8ba0d143e471c85f8a116707c0b42bf046b0a7b3; >= 48eb03dd26304c24f03bdbb9382e89c8564e71df, < 53a5b262d706b572840cbe8feae392538077ee19; >= 48eb03dd26304c24f03bdbb9382e89c8564e71df, < bf9387488d6394845076928c6ca5315ce5d84f54; >= 48eb03dd26304c24f03bdbb9382e89c8564e71df, < a6e4b9a6deb9362ef7a0706c70d674e92fe1411a |
| Linux | Linux | 6.8 |
References
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 21, 2026
- NVD status
- Received