CVE-2026-98614 (GCVE-0-2026-98614)
Vulnerability from cvelistv5
Published
2026-10-18 15:19
Modified
2026-10-19 09:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: avoid livelock while updating retransmit path sctp_assoc_update_retran_path() can loop forever when every remaining transport, including retran_path, is SCTP_UNCONFIRMED: the state check runs before the wraparound test, so the loop cannot observe that it has completed a full pass. Fix this by considering a transport only when it is not UNCONFIRMED, then checking whether the walk has returned to retran_path. This makes the full-pass termination independent of the transport state while preserving the existing fallback selection semantics. Also restore the NULL guard around the retran_path assignment. In the all-UNCONFIRMED case there is no eligible replacement transport, and installing NULL would leave later retransmit-path users and the debug print with a NULL path.
References
Impacted products
Vendor Product Version
Linux Linux Version: 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0
Version: 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0
Version: 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0
Version: 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0
Version: 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0
Version: 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0
Version: 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0
Version: 4c47af4d5eb2c2f78f886079a3920a7078a6f0a0
Version: 8ceaec02b17397d12719a282945abc95f8149d9f
Version: d2c2bdcdd8c5ce3d2a68aa3353ed1f340c3e500e
Version: 3.10.106   ≤
Version: 3.12.71   ≤
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sctp/associola.c"
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        },
        {
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "3.14"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.10.271",
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            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
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              "status": "unaffected",
              "version": "6.1.189",
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            {
              "lessThanOrEqual": "6.6.*",
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              "version": "6.6.158",
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            {
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            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: avoid livelock while updating retransmit path\n\nsctp_assoc_update_retran_path() can loop forever when every remaining\ntransport, including retran_path, is SCTP_UNCONFIRMED: the state check\nruns before the wraparound test, so the loop cannot observe that it has\ncompleted a full pass.\n\nFix this by considering a transport only when it is not UNCONFIRMED,\nthen checking whether the walk has returned to retran_path. This makes\nthe full-pass termination independent of the transport state while\npreserving the existing fallback selection semantics.\n\nAlso restore the NULL guard around the retran_path assignment. In the\nall-UNCONFIRMED case there is no eligible replacement transport, and\ninstalling NULL would leave later retransmit-path users and the debug\nprint with a NULL path."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:22:42.185Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3fe624c3843694ab096fdb198526ba0c659febbe"
        },
        {
          "url": "https://git.kernel.org/stable/c/43410c1f2db53516e95ddd7e5b4b02f495b78121"
        },
        {
          "url": "https://git.kernel.org/stable/c/d893a7cc1cb41dd510f338bb2bfd8f29b14eaf49"
        },
        {
          "url": "https://git.kernel.org/stable/c/83b1a7f9e718828ef364a7b004254ebb2d0035fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/173610fff55022a5ad1579fbcc7faa97467b58b7"
        },
        {
          "url": "https://git.kernel.org/stable/c/c9338057df1025f578fe7d0ff08bada87b8b838d"
        },
        {
          "url": "https://git.kernel.org/stable/c/ddc34cc0834c873871e88b055ee6a260676efe97"
        },
        {
          "url": "https://git.kernel.org/stable/c/d2c31b837406395e576afeb25958c98e9938f3f6"
        }
      ],
      "title": "sctp: avoid livelock while updating retransmit path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98614",
    "datePublished": "2026-10-18T15:19:34.494Z",
    "dateReserved": "2026-09-25T10:25:14.360Z",
    "dateUpdated": "2026-10-19T09:22:42.185Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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