{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43491",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:56.013Z",
        "datePublished": "2026-05-19T10:44:23.832Z",
        "dateUpdated": "2026-08-19T16:27:59.057Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-19T16:27:59.057Z"
            },
            "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'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": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/qrtr/ns.c"
                    ],
                    "versions": [
                        {
                            "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
                            "lessThan": "b48fc702b20233b809f01053232c3cd5083c97b4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
                            "lessThan": "991c431077b19176d3fe3bb54054c063776a8cdc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
                            "lessThan": "94914731ca0b99899dceadd80d2df00584a688ca",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
                            "lessThan": "e6f6cd501fb54060940a6eb3f4103eeb5e426ae7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
                            "lessThan": "3efaad55cad1ded429e3a873bfece389058a526b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
                            "lessThan": "35fb4a0c077c5d1049c2628b769e0a1b1e65df0d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
                            "lessThan": "868202aa2adae427060a42d5bd663b4d782ec02c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0c2204a4ad710d95d348ea006f14ba926e842ffd",
                            "lessThan": "d5ee2ff98322337951c56398e79d51815acbf955",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/qrtr/ns.c"
                    ],
                    "versions": [
                        {
                            "version": "5.7",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.7",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.265",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.216",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.183",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.140",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.86",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.27",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.4",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "5.10.265"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "5.15.216"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "6.1.183"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "6.6.140"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "6.12.86"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "6.18.27"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "7.0.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "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"
                },
                {
                    "url": "https://git.kernel.org/stable/c/35fb4a0c077c5d1049c2628b769e0a1b1e65df0d"
                },
                {
                    "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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}