{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80996",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.812Z",
        "datePublished": "2026-09-11T19:42:51.542Z",
        "dateUpdated": "2026-10-21T12:47:23.378Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:47:23.378Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: l2tp: do not propagate multicast notification errors\n\nThe tunnel create, tunnel modify, session create, and session modify\nnetlink handlers send multicast notifications through helpers that can fail\nwhile allocating or encoding a message, or while multicasting it.\n\nFor tunnel and session create/modify, a notification is sent after the live\noperation has completed. Returning a best-effort notification error as the\ncommand result can therefore report failure for an operation that already\ncommitted and can cause callers to retry and accumulate live objects.\n\nKeep sending notifications for listener visibility, but do not propagate\ntheir best-effort status as the command result. This also keeps the tunnel\nmodify command consistent with the other notification-only paths."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/l2tp/l2tp_netlink.c"
                    ],
                    "versions": [
                        {
                            "version": "33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b",
                            "lessThan": "7efe1c31e0903a5aa796feb96d3adab574b7ff41",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b",
                            "lessThan": "0fe037d5eaad938aa3e9143ee071aa237750b42b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b",
                            "lessThan": "9c340473f4822bb31b151c19afd17448eda5acd1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b",
                            "lessThan": "50c4038f1670bf9a80c6a58ae83d1602decd8481",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b",
                            "lessThan": "af20e269f7459d2ce69887fdf2fad7caf986c865",
                            "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/l2tp/l2tp_netlink.c"
                    ],
                    "versions": [
                        {
                            "version": "4.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.109",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.50",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.4",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "4.0",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "6.12.109"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "6.18.50"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "7.2.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.0",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/7efe1c31e0903a5aa796feb96d3adab574b7ff41"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0fe037d5eaad938aa3e9143ee071aa237750b42b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9c340473f4822bb31b151c19afd17448eda5acd1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/50c4038f1670bf9a80c6a58ae83d1602decd8481"
                },
                {
                    "url": "https://git.kernel.org/stable/c/af20e269f7459d2ce69887fdf2fad7caf986c865"
                }
            ],
            "title": "net: l2tp: do not propagate multicast notification errors",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}