CVE-2026-43491 (GCVE-0-2026-43491)
Vulnerability from cvelistv5
Published
2026-05-19 10:44
Modified
2026-08-19 16:27
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Limit the maximum server registration per node Current code does no bound checking on the number of servers added per node. A malicious client can flood NEW_SERVER messages and exhaust memory. Fix this issue by limiting the maximum number of server registrations to 256 per node. If the NEW_SERVER message is received for an old port, then don't restrict it as it will get replaced. While at it, also rate limit the error messages in the failure path of qrtr_ns_worker(). Note that the limit of 256 is chosen based on the current platform requirements. If requirement changes in the future, this limit can be increased.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0c2204a4ad710d95d348ea006f14ba926e842ffd
Version: 0c2204a4ad710d95d348ea006f14ba926e842ffd
Version: 0c2204a4ad710d95d348ea006f14ba926e842ffd
Version: 0c2204a4ad710d95d348ea006f14ba926e842ffd
Version: 0c2204a4ad710d95d348ea006f14ba926e842ffd
Version: 0c2204a4ad710d95d348ea006f14ba926e842ffd
Version: 0c2204a4ad710d95d348ea006f14ba926e842ffd
Version: 0c2204a4ad710d95d348ea006f14ba926e842ffd
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "net/qrtr/ns.c"
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      "cpeApplicability": [
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027t 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:27:59.057Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b48fc702b20233b809f01053232c3cd5083c97b4"
        },
        {
          "url": "https://git.kernel.org/stable/c/991c431077b19176d3fe3bb54054c063776a8cdc"
        },
        {
          "url": "https://git.kernel.org/stable/c/94914731ca0b99899dceadd80d2df00584a688ca"
        },
        {
          "url": "https://git.kernel.org/stable/c/e6f6cd501fb54060940a6eb3f4103eeb5e426ae7"
        },
        {
          "url": "https://git.kernel.org/stable/c/3efaad55cad1ded429e3a873bfece389058a526b"
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          "url": "https://git.kernel.org/stable/c/35fb4a0c077c5d1049c2628b769e0a1b1e65df0d"
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        {
          "url": "https://git.kernel.org/stable/c/868202aa2adae427060a42d5bd663b4d782ec02c"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5ee2ff98322337951c56398e79d51815acbf955"
        }
      ],
      "title": "net: qrtr: ns: Limit the maximum server registration per node",
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      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43491",
    "datePublished": "2026-05-19T10:44:23.832Z",
    "dateReserved": "2026-05-01T14:12:56.013Z",
    "dateUpdated": "2026-08-19T16:27:59.057Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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