{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "48eb03dd26304c24f03bdbb9382e89c8564e71df"
            },
            {
              "fixed": "53a5b262d706b572840cbe8feae392538077ee19"
            },
            {
              "fixed": "bf9387488d6394845076928c6ca5315ce5d84f54"
            },
            {
              "fixed": "a6e4b9a6deb9362ef7a0706c70d674e92fe1411a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.8.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90086.json"
  },
  "details": "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.",
  "id": "CVE-2026-90086",
  "modified": "2026-09-19T03:30:22.714003307Z",
  "published": "2026-09-17T16:06:02.212Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/53a5b262d706b572840cbe8feae392538077ee19"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6e4b9a6deb9362ef7a0706c70d674e92fe1411a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bf9387488d6394845076928c6ca5315ce5d84f54"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90086.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90086"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "xsk: honor XDP_TX_METADATA in zero-copy path"
}