CVE-2026-90086

CVE CVE-2026-90086EUVD EUVD-2026-81947Published 2026-09-17T16:06:02.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.18.52; 48eb03dd26304c24f03bdbb9382e89c8564e71df <53a5b262d706b572840cbe8feae392538077ee19; 6.8; 48eb03dd26304c24f03bdbb9382e89c8564e71df <bf9387488d6394845076928c6ca5315ce5d84f54; patch: 0; 48eb03dd26304c24f03bdbb9382e89c8564e71df <a6e4b9a6deb9362ef7a0706c70d674e92fe1411a; patch: 7.2.6; patch: 7.3-rc1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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