CVE-2026-46084 (GCVE-0-2026-46084)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:58 – Updated: 2026-06-14 17:53
VLAI
Title
RDMA/mana_ib: Disable RX steering on RSS QP destroy
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/mana_ib: Disable RX steering on RSS QP destroy When an RSS QP is destroyed (e.g. DPDK exit), mana_ib_destroy_qp_rss() destroys the RX WQ objects but does not disable vPort RX steering in firmware. This leaves stale steering configuration that still points to the destroyed RX objects. If traffic continues to arrive (e.g. peer VM is still transmitting) and the VF interface is subsequently brought up (mana_open), the firmware may deliver completions using stale CQ IDs from the old RX objects. These CQ IDs can be reused by the ethernet driver for new TX CQs, causing RX completions to land on TX CQs: WARNING: mana_poll_tx_cq+0x1b8/0x220 [mana] (is_sq == false) WARNING: mana_gd_process_eq_events+0x209/0x290 (cq_table lookup fails) Fix this by disabling vPort RX steering before destroying RX WQ objects. Note that mana_fence_rqs() cannot be used here because the fence completion is delivered on the CQ, which is polled by user-mode (e.g. DPDK) and not visible to the kernel driver. Refactor the disable logic into a shared mana_disable_vport_rx() in mana_en, exported for use by mana_ib, replacing the duplicate code. The ethernet driver's mana_dealloc_queues() is also updated to call this common function.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0266a177631d4c6b963b5b12dd986a8c5abdbf06 , < 6a2d6273b6c3581ce7b90ce17b5cbb4efd19438f (git)
Affected: 0266a177631d4c6b963b5b12dd986a8c5abdbf06 , < f1ccc4d500a0b87a5599343fc2f798048836e184 (git)
Affected: 0266a177631d4c6b963b5b12dd986a8c5abdbf06 , < 8ba804869382ce307f2a15f5f6f2adfd791f41dc (git)
Affected: 0266a177631d4c6b963b5b12dd986a8c5abdbf06 , < 3be5ed233de03b00ae868cfc06e95331d8d9007c (git)
Affected: 0266a177631d4c6b963b5b12dd986a8c5abdbf06 , < dbeb256e8dd87233d891b170c0b32a6466467036 (git)
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Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.86 , ≤ 6.12.* (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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          "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."
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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 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-27T06:46:07+00:00",
      "cve": "CVE-2026-46084",
      "id": "CVE-2026-46084",
      "initial_release_date": "2026-05-27T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA/mana_ib: Disable RX steering on RSS QP destroy",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46084.json",
      "version": "3"
    },
    "suse_vex": {
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      "current_release_date": "2026-06-15T01:24:13Z",
      "cve": "CVE-2026-46084",
      "id": "CVE-2026-46084",
      "initial_release_date": "2026-05-28T03:52:57Z",
      "product_status:known_affected": "88",
      "product_status:known_not_affected": "203",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46084",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46084.json",
      "version": "4"
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.