{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mana_ib: Disable RX steering on RSS QP destroy\n\nWhen an RSS QP is destroyed (e.g. DPDK exit), mana_ib_destroy_qp_rss()\ndestroys the RX WQ objects but does not disable vPort RX steering in\nfirmware. This leaves stale steering configuration that still points to\nthe destroyed RX objects.\n\nIf traffic continues to arrive (e.g. peer VM is still transmitting) and\nthe VF interface is subsequently brought up (mana_open), the firmware\nmay deliver completions using stale CQ IDs from the old RX objects.\nThese CQ IDs can be reused by the ethernet driver for new TX CQs,\ncausing RX completions to land on TX CQs:\n\n  WARNING: mana_poll_tx_cq+0x1b8/0x220 [mana]  (is_sq == false)\n  WARNING: mana_gd_process_eq_events+0x209/0x290 (cq_table lookup fails)\n\nFix this by disabling vPort RX steering before destroying RX WQ objects.\nNote that mana_fence_rqs() cannot be used here because the fence\ncompletion is delivered on the CQ, which is polled by user-mode (e.g.\nDPDK) and not visible to the kernel driver.\n\nRefactor the disable logic into a shared mana_disable_vport_rx() in\nmana_en, exported for use by mana_ib, replacing the duplicate code.\nThe ethernet driver\u0027s mana_dealloc_queues() is also updated to call\nthis common function."
    }
  ],
  "id": "CVE-2026-46084",
  "lastModified": "2026-05-27T14:48:03.013",
  "metrics": {},
  "published": "2026-05-27T14:17:29.833",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3be5ed233de03b00ae868cfc06e95331d8d9007c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6a2d6273b6c3581ce7b90ce17b5cbb4efd19438f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8ba804869382ce307f2a15f5f6f2adfd791f41dc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dbeb256e8dd87233d891b170c0b32a6466467036"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f1ccc4d500a0b87a5599343fc2f798048836e184"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-46084"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:29Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mana_ib: Disable RX steering on RSS QP destroy\n\nWhen an RSS QP is destroyed (e.g. DPDK exit), mana_ib_destroy_qp_rss()\ndestroys the RX WQ objects but does not disable vPort RX steering in\nfirmware. This leaves stale steering configuration that still points to\nthe destroyed RX objects.\n\nIf traffic continues to arrive (e.g. peer VM is still transmitting) and\nthe VF interface is subsequently brought up (mana_open), the firmware\nmay deliver completions using stale CQ IDs from the old RX objects.\nThese CQ IDs can be reused by the ethernet driver for new TX CQs,\ncausing RX completions to land on TX CQs:\n\n  WARNING: mana_poll_tx_cq+0x1b8/0x220 [mana]  (is_sq == false)\n  WARNING: mana_gd_process_eq_events+0x209/0x290 (cq_table lookup fails)\n\nFix this by disabling vPort RX steering before destroying RX WQ objects.\nNote that mana_fence_rqs() cannot be used here because the fence\ncompletion is delivered on the CQ, which is polled by user-mode (e.g.\nDPDK) and not visible to the kernel driver.\n\nRefactor the disable logic into a shared mana_disable_vport_rx() in\nmana_en, exported for use by mana_ib, replacing the duplicate code.\nThe ethernet driver\u0027s mana_dealloc_queues() is also updated to call\nthis common function.",
  "id": "GHSA-996r-prhc-hfj8",
  "modified": "2026-05-27T15:33:23Z",
  "published": "2026-05-27T15:33:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46084"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3be5ed233de03b00ae868cfc06e95331d8d9007c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6a2d6273b6c3581ce7b90ce17b5cbb4efd19438f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ba804869382ce307f2a15f5f6f2adfd791f41dc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dbeb256e8dd87233d891b170c0b32a6466467036"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1ccc4d500a0b87a5599343fc2f798048836e184"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-46084 RDMA/mana_ib: Disable RX steering on RSS QP destroy - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46084.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "RDMA/mana_ib: Disable RX steering on RSS QP destroy",
    "tracking": {
      "current_release_date": "2026-05-29T01:42:47.000Z",
      "generator": {
        "date": "2026-05-29T07:23:45.789Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-46084",
      "initial_release_date": "2026-05-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-05-28T01:03:12.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-05-28T14:46:02.000Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Information published."
        },
        {
          "date": "2026-05-29T01:42:47.000Z",
          "legacy_version": "2",
          "number": "3",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "azl3 kernel 0:6.6.139.1-1.azl3",
                "product": {
                  "name": "azl3 kernel 0:6.6.139.1-1.azl3",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "kernel"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 kernel 0:6.6.139.1-1.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-46084",
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_affected": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-46084 RDMA/mana_ib: Disable RX steering on RSS QP destroy - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46084.json"
        }
      ],
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-05-28T01:03:12.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-1"
          ]
        }
      ],
      "title": "RDMA/mana_ib: Disable RX steering on RSS QP destroy"
    }
  ]
}