{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-41006",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetrom: Fix a memory leak in nr_heartbeat_expiry()\n\nsyzbot reported a memory leak in nr_create() [0].\n\nCommit 409db27e3a2e (\"netrom: Fix use-after-free of a listening socket.\")\nadded sock_hold() to the nr_heartbeat_expiry() function, where\na) a socket has a SOCK_DESTROY flag or\nb) a listening socket has a SOCK_DEAD flag.\n\nBut in the case \"a,\" when the SOCK_DESTROY flag is set, the file descriptor\nhas already been closed and the nr_release() function has been called.\nSo it makes no sense to hold the reference count because no one will\ncall another nr_destroy_socket() and put it as in the case \"b.\"\n\nnr_connect\n  nr_establish_data_link\n    nr_start_heartbeat\n\nnr_release\n  switch (nr->state)\n  case NR_STATE_3\n    nr->state = NR_STATE_2\n    sock_set_flag(sk, SOCK_DESTROY);\n\n                        nr_rx_frame\n                          nr_process_rx_frame\n                            switch (nr->state)\n                            case NR_STATE_2\n                              nr_state2_machine()\n                                nr_disconnect()\n                                  nr_sk(sk)->state = NR_STATE_0\n                                  sock_set_flag(sk, SOCK_DEAD)\n\n                        nr_heartbeat_expiry\n                          switch (nr->state)\n                          case NR_STATE_0\n                            if (sock_flag(sk, SOCK_DESTROY) ||\n                               (sk->sk_state == TCP_LISTEN\n                                 && sock_flag(sk, SOCK_DEAD)))\n                               sock_hold()  // ( !!! )\n                               nr_destroy_socket()\n\nTo fix the memory leak, let's call sock_hold() only for a listening socket.\n\nFound by InfoTeCS on behalf of Linux Verification Center\n(linuxtesting.org) with Syzkaller.\n\n[0]: https://syzkaller.appspot.com/bug?extid=d327a1f3b12e1e206c16"
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "a31caf5779ac",
                                            "version_value": "d616876256b3"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "fe9b9e621ceb",
                                            "version_value": "e07a9c2a850c"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "7de16d75b20a",
                                            "version_value": "5391f9db2cab"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "d2d3ab1b1de3",
                                            "version_value": "280cf1173726"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "51e394c6f81a",
                                            "version_value": "a02fd5d775cf"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "409db27e3a2e",
                                            "version_value": "b6ebe4fed73e"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "6.2",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "6.2",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.19.317",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.4.279",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.221",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.15.162",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.1.96",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.6.36",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.9.7",
                                                        "lessThanOrEqual": "6.9.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.10",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/d616876256b38ecf9a1a1c7d674192c5346bc69c",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/d616876256b38ecf9a1a1c7d674192c5346bc69c"
            },
            {
                "url": "https://git.kernel.org/stable/c/e07a9c2a850cdebf625e7a1b8171bd23a8554313",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/e07a9c2a850cdebf625e7a1b8171bd23a8554313"
            },
            {
                "url": "https://git.kernel.org/stable/c/5391f9db2cab5ef1cb411be1ab7dbec728078fba",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/5391f9db2cab5ef1cb411be1ab7dbec728078fba"
            },
            {
                "url": "https://git.kernel.org/stable/c/280cf1173726a7059b628c610c71050d5c0b6937",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/280cf1173726a7059b628c610c71050d5c0b6937"
            },
            {
                "url": "https://git.kernel.org/stable/c/a02fd5d775cf9787ee7698c797e20f2fa13d2e2b",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/a02fd5d775cf9787ee7698c797e20f2fa13d2e2b"
            },
            {
                "url": "https://git.kernel.org/stable/c/b6ebe4fed73eedeb73f4540f8edc4871945474c8",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/b6ebe4fed73eedeb73f4540f8edc4871945474c8"
            },
            {
                "url": "https://git.kernel.org/stable/c/d377f5a28332954b19e373d36823e59830ab1712",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/d377f5a28332954b19e373d36823e59830ab1712"
            },
            {
                "url": "https://git.kernel.org/stable/c/0b9130247f3b6a1122478471ff0e014ea96bb735",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/0b9130247f3b6a1122478471ff0e014ea96bb735"
            }
        ]
    },
    "generator": {
        "engine": "bippy-c9c4e1df01b2"
    }
}