{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-99071",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.389Z",
        "datePublished": "2026-10-23T12:23:14.297Z",
        "dateUpdated": "2026-10-23T12:23:14.297Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-23T12:23:14.297Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: do not warn on route notification size race\n\nCommit 680aea08e78c (\"net: ipv4: Emit notification when fib hardware\nflags are changed\") added asynchronous route notifications for hardware\nflag changes.\n\nfib_alias_hw_flags_set() sizes the skb with fib_nlmsg_size() and later\nfills it with fib_dump_info() while holding only RCU.  With nexthop\ncompatibility mode enabled, a concurrent replacement can grow the group\nbetween these independent snapshots.  fib_dump_info() can then\nlegitimately return -EMSGSIZE, so the warning does not prove a sizing bug.\n\nRemove the warning.  The existing error path still frees the skb and\nreports the error to listeners."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv4/fib_trie.c"
                    ],
                    "versions": [
                        {
                            "version": "680aea08e78c003292415518ad270bc20f9c80b1",
                            "lessThan": "088ba80eef85fa7a5ad8f9e7c82b403c99242b56",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "680aea08e78c003292415518ad270bc20f9c80b1",
                            "lessThan": "78a1cf5c54b2f795c81fedb530755a8d01cc84f0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "680aea08e78c003292415518ad270bc20f9c80b1",
                            "lessThan": "7dfa7ca97f3ac46353edd4cc44f7733758e4535b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "680aea08e78c003292415518ad270bc20f9c80b1",
                            "lessThan": "221ef5e1e44a044790f0f54e6aa237883f475a4d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "680aea08e78c003292415518ad270bc20f9c80b1",
                            "lessThan": "e02a5b6588161673ef75a4bc5cdfb62bd493374d",
                            "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/ipv4/fib_trie.c"
                    ],
                    "versions": [
                        {
                            "version": "5.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.12",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.113",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.57",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.11",
                            "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": "5.12",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "6.12.113"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "6.18.57"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "7.2.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/088ba80eef85fa7a5ad8f9e7c82b403c99242b56"
                },
                {
                    "url": "https://git.kernel.org/stable/c/78a1cf5c54b2f795c81fedb530755a8d01cc84f0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7dfa7ca97f3ac46353edd4cc44f7733758e4535b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/221ef5e1e44a044790f0f54e6aa237883f475a4d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e02a5b6588161673ef75a4bc5cdfb62bd493374d"
                }
            ],
            "title": "ipv4: do not warn on route notification size race",
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                "engine": "bippy-1.2.0"
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    }
}