{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53072",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-05-02T15:51:43.548Z",
        "datePublished": "2025-05-02T15:55:23.765Z",
        "dateUpdated": "2026-05-11T19:38:00.315Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:38:00.315Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: use the workqueue to destroy unaccepted sockets\n\nChristoph reported a UaF at token lookup time after having\nrefactored the passive socket initialization part:\n\n  BUG: KASAN: use-after-free in __token_bucket_busy+0x253/0x260\n  Read of size 4 at addr ffff88810698d5b0 by task syz-executor653/3198\n\n  CPU: 1 PID: 3198 Comm: syz-executor653 Not tainted 6.2.0-rc59af4eaa31c1f6c00c8f1e448ed99a45c66340dd5 #6\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n  Call Trace:\n   <TASK>\n   dump_stack_lvl+0x6e/0x91\n   print_report+0x16a/0x46f\n   kasan_report+0xad/0x130\n   __token_bucket_busy+0x253/0x260\n   mptcp_token_new_connect+0x13d/0x490\n   mptcp_connect+0x4ed/0x860\n   __inet_stream_connect+0x80e/0xd90\n   tcp_sendmsg_fastopen+0x3ce/0x710\n   mptcp_sendmsg+0xff1/0x1a20\n   inet_sendmsg+0x11d/0x140\n   __sys_sendto+0x405/0x490\n   __x64_sys_sendto+0xdc/0x1b0\n   do_syscall_64+0x3b/0x90\n   entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nWe need to properly clean-up all the paired MPTCP-level\nresources and be sure to release the msk last, even when\nthe unaccepted subflow is destroyed by the TCP internals\nvia inet_child_forget().\n\nWe can re-use the existing MPTCP_WORK_CLOSE_SUBFLOW infra,\nexplicitly checking that for the critical scenario: the\nclosed subflow is the MPC one, the msk is not accepted and\neventually going through full cleanup.\n\nWith such change, __mptcp_destroy_sock() is always called\non msk sockets, even on accepted ones. We don't need anymore\nto transiently drop one sk reference at msk clone time.\n\nPlease note this commit depends on the parent one:\n\n  mptcp: refactor passive socket initialization"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/mptcp/protocol.c",
                        "net/mptcp/protocol.h",
                        "net/mptcp/subflow.c"
                    ],
                    "versions": [
                        {
                            "version": "58b09919626bf9067345289212ec030c61eb1034",
                            "lessThan": "2827f099b3fb9a59263c997400e9182f5d423e84",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "58b09919626bf9067345289212ec030c61eb1034",
                            "lessThan": "804cf487fb0031f3c74755b78d8663333f0ba636",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "58b09919626bf9067345289212ec030c61eb1034",
                            "lessThan": "b6985b9b82954caa53f862d6059d06c0526254f0",
                            "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/mptcp/protocol.c",
                        "net/mptcp/protocol.h",
                        "net/mptcp/subflow.c"
                    ],
                    "versions": [
                        {
                            "version": "5.7",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.7",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.22",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.8",
                            "lessThanOrEqual": "6.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3",
                            "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": "5.7",
                                    "versionEndExcluding": "6.1.22"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "6.2.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "6.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2827f099b3fb9a59263c997400e9182f5d423e84"
                },
                {
                    "url": "https://git.kernel.org/stable/c/804cf487fb0031f3c74755b78d8663333f0ba636"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b6985b9b82954caa53f862d6059d06c0526254f0"
                }
            ],
            "title": "mptcp: use the workqueue to destroy unaccepted sockets",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}