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FKIE_CVE-2026-80988

Vulnerability from fkie_nvd - Published: 2026-09-11 20:19 - Updated: 2026-09-14 13:18
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/45cc11035165918dd1f81796ea98f81ece20d361
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5eca0d899a3be661a7e2caaaa7467a6fa15d756c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/76c9ccc0c6bebfc74c0e727eda67687f5103ab06
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/873ce713fef5dde0939220f04f3484ec86a16fba
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89177732fe1653bbfef10cf5d99bf20cf57762c2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/894e136b432da75c0352c80299807a5c4b04f167
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96d792c65b9d5f7f9dd86a1004315db59e450c07
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e6cc541fab01099fd8efadfa4f13afdf118bf536
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/ntb/ntb_transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "76c9ccc0c6bebfc74c0e727eda67687f5103ab06",
              "status": "affected",
              "version": "3cfdc448e8bfa8a7eaa5af87f357330566124b78",
              "versionType": "git"
            },
            {
              "lessThan": "96d792c65b9d5f7f9dd86a1004315db59e450c07",
              "status": "affected",
              "version": "bfa051f650a7708183bd86901ca4645dcf88c486",
              "versionType": "git"
            },
            {
              "lessThan": "45cc11035165918dd1f81796ea98f81ece20d361",
              "status": "affected",
              "version": "4f4af6b8b7a23fa37decaf43b55403e6bfd8e219",
              "versionType": "git"
            },
            {
              "lessThan": "e6cc541fab01099fd8efadfa4f13afdf118bf536",
              "status": "affected",
              "version": "f195a1a6fe416882984f8bd6c61afc1383171860",
              "versionType": "git"
            },
            {
              "lessThan": "5eca0d899a3be661a7e2caaaa7467a6fa15d756c",
              "status": "affected",
              "version": "f195a1a6fe416882984f8bd6c61afc1383171860",
              "versionType": "git"
            },
            {
              "lessThan": "894e136b432da75c0352c80299807a5c4b04f167",
              "status": "affected",
              "version": "f195a1a6fe416882984f8bd6c61afc1383171860",
              "versionType": "git"
            },
            {
              "lessThan": "89177732fe1653bbfef10cf5d99bf20cf57762c2",
              "status": "affected",
              "version": "f195a1a6fe416882984f8bd6c61afc1383171860",
              "versionType": "git"
            },
            {
              "lessThan": "873ce713fef5dde0939220f04f3484ec86a16fba",
              "status": "affected",
              "version": "f195a1a6fe416882984f8bd6c61afc1383171860",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "aa6d6ed213b62cbdb09ea32abbfa085dd987a0c9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a8986a61ebee0b54c5d648444fbae09bd1c6dcd2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "94491412a2afc8a5aea4c5b455aed86d3486f0b1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c2cd5d993f57f819d46fe62387d3cc34d8468e60",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "449b1978d4e50b14b2a4de3a26d0b074593926a3",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.270",
              "status": "affected",
              "version": "5.10.195",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.221",
              "status": "affected",
              "version": "5.15.132",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.188",
              "status": "affected",
              "version": "6.1.53",
              "versionType": "semver"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.326",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.295",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.257",
              "versionType": "semver"
            },
            {
              "lessThan": "6.5",
              "status": "affected",
              "version": "6.4.16",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6",
              "status": "affected",
              "version": "6.5.3",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/ntb/ntb_transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-80988",
  "lastModified": "2026-09-14T13:18:53.493",
  "metrics": {},
  "published": "2026-09-11T20:19:05.480",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/45cc11035165918dd1f81796ea98f81ece20d361"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5eca0d899a3be661a7e2caaaa7467a6fa15d756c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/76c9ccc0c6bebfc74c0e727eda67687f5103ab06"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/873ce713fef5dde0939220f04f3484ec86a16fba"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/89177732fe1653bbfef10cf5d99bf20cf57762c2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/894e136b432da75c0352c80299807a5c4b04f167"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/96d792c65b9d5f7f9dd86a1004315db59e450c07"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e6cc541fab01099fd8efadfa4f13afdf118bf536"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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