CVE-2026-80988 (GCVE-0-2026-80988)
Vulnerability from cvelistv5
Published
2026-09-11 19:42
Modified
2026-10-19 08:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: NTB: ntb_transport: Fail TX enqueue when the QP link is down Commit f195a1a6fe41 ("ntb: Drop packets when qp link is down") meant to make ntb_transport_tx_enqueue() drop packets submitted while the QP link is down, but it only returns 0 without consuming the packet. Zero means success by this function's contract, so ntb_netdev reports NETDEV_TX_OK and forgets the skb: nothing queued it, nothing frees it, and it leaks, one skb for every transmit racing a link-down. Return -ENOLINK instead, restoring the contract that a non-zero return leaves the buffer owned by the caller. With the preceding patch, ntb_netdev frees the skb on non-retryable enqueue failures and returns NETDEV_TX_OK, so a packet racing with link-down is dropped without leaking or entering a busy retry loop.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3cfdc448e8bfa8a7eaa5af87f357330566124b78
Version: bfa051f650a7708183bd86901ca4645dcf88c486
Version: 4f4af6b8b7a23fa37decaf43b55403e6bfd8e219
Version: f195a1a6fe416882984f8bd6c61afc1383171860
Version: f195a1a6fe416882984f8bd6c61afc1383171860
Version: f195a1a6fe416882984f8bd6c61afc1383171860
Version: f195a1a6fe416882984f8bd6c61afc1383171860
Version: f195a1a6fe416882984f8bd6c61afc1383171860
Version: aa6d6ed213b62cbdb09ea32abbfa085dd987a0c9
Version: a8986a61ebee0b54c5d648444fbae09bd1c6dcd2
Version: 94491412a2afc8a5aea4c5b455aed86d3486f0b1
Version: c2cd5d993f57f819d46fe62387d3cc34d8468e60
Version: 449b1978d4e50b14b2a4de3a26d0b074593926a3
Version: 5.10.195   ≤
Version: 5.15.132   ≤
Version: 6.1.53   ≤
Version: 4.14.326   ≤
Version: 4.19.295   ≤
Version: 5.4.257   ≤
Version: 6.4.16   ≤
Version: 6.5.3   ≤
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNTB: ntb_transport: Fail TX enqueue when the QP link is down\n\nCommit f195a1a6fe41 (\"ntb: Drop packets when qp link is down\") meant to\nmake ntb_transport_tx_enqueue() drop packets submitted while the QP link\nis down, but it only returns 0 without consuming the packet. Zero means\nsuccess by this function\u0027s contract, so ntb_netdev reports NETDEV_TX_OK\nand forgets the skb: nothing queued it, nothing frees it, and it leaks,\none skb for every transmit racing a link-down.\n\nReturn -ENOLINK instead, restoring the contract that a non-zero return\nleaves the buffer owned by the caller. With the preceding patch,\nntb_netdev frees the skb on non-retryable enqueue failures and returns\nNETDEV_TX_OK, so a packet racing with link-down is dropped without leaking\nor entering a busy retry loop."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:46:12.548Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/76c9ccc0c6bebfc74c0e727eda67687f5103ab06"
        },
        {
          "url": "https://git.kernel.org/stable/c/96d792c65b9d5f7f9dd86a1004315db59e450c07"
        },
        {
          "url": "https://git.kernel.org/stable/c/45cc11035165918dd1f81796ea98f81ece20d361"
        },
        {
          "url": "https://git.kernel.org/stable/c/e6cc541fab01099fd8efadfa4f13afdf118bf536"
        },
        {
          "url": "https://git.kernel.org/stable/c/5eca0d899a3be661a7e2caaaa7467a6fa15d756c"
        },
        {
          "url": "https://git.kernel.org/stable/c/894e136b432da75c0352c80299807a5c4b04f167"
        },
        {
          "url": "https://git.kernel.org/stable/c/89177732fe1653bbfef10cf5d99bf20cf57762c2"
        },
        {
          "url": "https://git.kernel.org/stable/c/873ce713fef5dde0939220f04f3484ec86a16fba"
        }
      ],
      "title": "NTB: ntb_transport: Fail TX enqueue when the QP link is down",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80988",
    "datePublished": "2026-09-11T19:42:46.228Z",
    "dateReserved": "2026-08-26T14:34:25.811Z",
    "dateUpdated": "2026-10-19T08:46:12.548Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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