{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-43491",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-43491"
  ],
  "published": "2026-05-19T10:43:50Z",
  "summary": "net: qrtr: ns: Limit the maximum server registration per node",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: ns: Limit the maximum server registration per node\n\nCurrent code does no bound checking on the number of servers added per\nnode. A malicious client can flood NEW_SERVER messages and exhaust memory.\n\nFix this issue by limiting the maximum number of server registrations to\n256 per node. If the NEW_SERVER message is received for an old port, then\ndon't restrict it as it will get replaced. While at it, also rate limit\nthe error messages in the failure path of qrtr_ns_worker().\n\nNote that the limit of 256 is chosen based on the current platform\nrequirements. If requirement changes in the future, this limit can be\nincreased.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.183",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-43491"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b48fc702b20233b809f01053232c3cd5083c97b4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/991c431077b19176d3fe3bb54054c063776a8cdc"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/94914731ca0b99899dceadd80d2df00584a688ca"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e6f6cd501fb54060940a6eb3f4103eeb5e426ae7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3efaad55cad1ded429e3a873bfece389058a526b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/35fb4a0c077c5d1049c2628b769e0a1b1e65df0d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/868202aa2adae427060a42d5bd663b4d782ec02c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d5ee2ff98322337951c56398e79d51815acbf955"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-19T16:47:12Z"
  }
}