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sctp: avoid livelock while updating retransmit path

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-98614

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98614

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4c47af4d5eb2c2f78f886079a3920a7078a6f0a0",
        "lessThan": "3fe624c3843694ab096fdb198526ba0c659febbe",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c47af4d5eb2c2f78f886079a3920a7078a6f0a0",
        "lessThan": "43410c1f2db53516e95ddd7e5b4b02f495b78121",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c47af4d5eb2c2f78f886079a3920a7078a6f0a0",
        "lessThan": "d893a7cc1cb41dd510f338bb2bfd8f29b14eaf49",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c47af4d5eb2c2f78f886079a3920a7078a6f0a0",
        "lessThan": "83b1a7f9e718828ef364a7b004254ebb2d0035fe",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c47af4d5eb2c2f78f886079a3920a7078a6f0a0",
        "lessThan": "173610fff55022a5ad1579fbcc7faa97467b58b7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c47af4d5eb2c2f78f886079a3920a7078a6f0a0",
        "lessThan": "c9338057df1025f578fe7d0ff08bada87b8b838d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c47af4d5eb2c2f78f886079a3920a7078a6f0a0",
        "lessThan": "ddc34cc0834c873871e88b055ee6a260676efe97",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c47af4d5eb2c2f78f886079a3920a7078a6f0a0",
        "lessThan": "d2c31b837406395e576afeb25958c98e9938f3f6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8ceaec02b17397d12719a282945abc95f8149d9f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d2c2bdcdd8c5ce3d2a68aa3353ed1f340c3e500e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3.10.106",
        "lessThan": "3.11",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "3.12.71",
        "lessThan": "3.13",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "net/sctp/associola.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.14"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.14",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.55",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.9",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/sctp/associola.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98614

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38633 · Revision 1
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Publisher date
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