{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0c2204a4ad710d95d348ea006f14ba926e842ffd"
            },
            {
              "fixed": "b48fc702b20233b809f01053232c3cd5083c97b4"
            },
            {
              "fixed": "991c431077b19176d3fe3bb54054c063776a8cdc"
            },
            {
              "fixed": "94914731ca0b99899dceadd80d2df00584a688ca"
            },
            {
              "fixed": "e6f6cd501fb54060940a6eb3f4103eeb5e426ae7"
            },
            {
              "fixed": "3efaad55cad1ded429e3a873bfece389058a526b"
            },
            {
              "fixed": "35fb4a0c077c5d1049c2628b769e0a1b1e65df0d"
            },
            {
              "fixed": "868202aa2adae427060a42d5bd663b4d782ec02c"
            },
            {
              "fixed": "d5ee2ff98322337951c56398e79d51815acbf955"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.7.0"
            },
            {
              "fixed": "5.10.265"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.216"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.140"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.86"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.27"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43491.json"
  },
  "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.",
  "id": "CVE-2026-43491",
  "modified": "2026-08-21T03:30:39.761227020Z",
  "published": "2026-05-19T10:44:23.832Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35fb4a0c077c5d1049c2628b769e0a1b1e65df0d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3efaad55cad1ded429e3a873bfece389058a526b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/868202aa2adae427060a42d5bd663b4d782ec02c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94914731ca0b99899dceadd80d2df00584a688ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/991c431077b19176d3fe3bb54054c063776a8cdc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b48fc702b20233b809f01053232c3cd5083c97b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5ee2ff98322337951c56398e79d51815acbf955"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6f6cd501fb54060940a6eb3f4103eeb5e426ae7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43491.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43491"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net: qrtr: ns: Limit the maximum server registration per node"
}