{"id":"CVE-2026-90086","title":"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_META…","summary":"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_META…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 48eb03dd26304c24f03bdbb9382e89c8564e71df < 53a5b262d706b572840cbe8feae392538077ee19","Linux >= 48eb03dd26304c24f03bdbb9382e89c8564e71df < bf9387488d6394845076928c6ca5315ce5d84f54","Linux >= 48eb03dd26304c24f03bdbb9382e89c8564e71df < a6e4b9a6deb9362ef7a0706c70d674e92fe1411a","Linux 6.8"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:16:58.637","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90086","references":[{"url":"https://git.kernel.org/stable/c/53a5b262d706b572840cbe8feae392538077ee19","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a6e4b9a6deb9362ef7a0706c70d674e92fe1411a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bf9387488d6394845076928c6ca5315ce5d84f54","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.894Z","epss":0.00198,"epssPercentile":0.09818,"slug":"CVE-2026-90086","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}