{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-21781",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-12-29T08:45:45.764Z",
        "datePublished": "2025-02-27T02:18:24.013Z",
        "dateUpdated": "2026-05-11T21:06:18.377Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:06:18.377Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: fix panic during interface removal\n\nReference counting is used to ensure that\nbatadv_hardif_neigh_node and batadv_hard_iface\nare not freed before/during\nbatadv_v_elp_throughput_metric_update work is\nfinished.\n\nBut there isn't a guarantee that the hard if will\nremain associated with a soft interface up until\nthe work is finished.\n\nThis fixes a crash triggered by reboot that looks\nlike this:\n\nCall trace:\n batadv_v_mesh_free+0xd0/0x4dc [batman_adv]\n batadv_v_elp_throughput_metric_update+0x1c/0xa4\n process_one_work+0x178/0x398\n worker_thread+0x2e8/0x4d0\n kthread+0xd8/0xdc\n ret_from_fork+0x10/0x20\n\n(the batadv_v_mesh_free call is misleading,\nand does not actually happen)\n\nI was able to make the issue happen more reliably\nby changing hardif_neigh->bat_v.metric_work work\nto be delayed work. This allowed me to track down\nand confirm the fix.\n\n[sven@narfation.org: prevent entering batadv_v_elp_get_throughput without\n soft_iface]"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/batman-adv/bat_v_elp.c"
                    ],
                    "versions": [
                        {
                            "version": "c833484e5f3872a38fe232c663586069d5ad9645",
                            "lessThan": "167422a07096a6006599067c8b55884064fa0b72",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c833484e5f3872a38fe232c663586069d5ad9645",
                            "lessThan": "ce3f1545bf8fa28bd05ec113679e8e6cd23af577",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c833484e5f3872a38fe232c663586069d5ad9645",
                            "lessThan": "f0a16c6c79768180333f3e41ce63f32730e3c3af",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c833484e5f3872a38fe232c663586069d5ad9645",
                            "lessThan": "7eb5dd201695645af071592a50026eb780081a72",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c833484e5f3872a38fe232c663586069d5ad9645",
                            "lessThan": "072b2787321903287a126c148e8db87dd7ef96fe",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c833484e5f3872a38fe232c663586069d5ad9645",
                            "lessThan": "2c3fb7df4cc6d043f70d4a8a10f8b915bbfb75e7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c833484e5f3872a38fe232c663586069d5ad9645",
                            "lessThan": "522b1596ea19e327853804da2de60aeb9c5d6f42",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c833484e5f3872a38fe232c663586069d5ad9645",
                            "lessThan": "ccb7276a6d26d6f8416e315b43b45e15ee7f29e2",
                            "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/batman-adv/bat_v_elp.c"
                    ],
                    "versions": [
                        {
                            "version": "4.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.291",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.235",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.179",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.129",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.79",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.16",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.13.4",
                            "lessThanOrEqual": "6.13.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.14",
                            "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": "4.6",
                                    "versionEndExcluding": "5.4.291"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "5.10.235"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "5.15.179"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "6.1.129"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "6.6.79"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "6.12.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "6.13.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "6.14"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/167422a07096a6006599067c8b55884064fa0b72"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ce3f1545bf8fa28bd05ec113679e8e6cd23af577"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f0a16c6c79768180333f3e41ce63f32730e3c3af"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7eb5dd201695645af071592a50026eb780081a72"
                },
                {
                    "url": "https://git.kernel.org/stable/c/072b2787321903287a126c148e8db87dd7ef96fe"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2c3fb7df4cc6d043f70d4a8a10f8b915bbfb75e7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/522b1596ea19e327853804da2de60aeb9c5d6f42"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ccb7276a6d26d6f8416e315b43b45e15ee7f29e2"
                }
            ],
            "title": "batman-adv: fix panic during interface removal",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        },
        "adp": [
            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
                    },
                    {
                        "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
                    }
                ],
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2025-11-03T20:59:27.625Z"
                }
            }
        ]
    }
}