{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53121",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-05-02T15:51:43.555Z",
        "datePublished": "2025-05-02T15:55:58.123Z",
        "dateUpdated": "2026-05-11T19:38:55.282Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:38:55.282Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: tcp_make_synack() can be called from process context\n\ntcp_rtx_synack() now could be called in process context as explained in\n0a375c822497 (\"tcp: tcp_rtx_synack() can be called from process\ncontext\").\n\ntcp_rtx_synack() might call tcp_make_synack(), which will touch per-CPU\nvariables with preemption enabled. This causes the following BUG:\n\n    BUG: using __this_cpu_add() in preemptible [00000000] code: ThriftIO1/5464\n    caller is tcp_make_synack+0x841/0xac0\n    Call Trace:\n     <TASK>\n     dump_stack_lvl+0x10d/0x1a0\n     check_preemption_disabled+0x104/0x110\n     tcp_make_synack+0x841/0xac0\n     tcp_v6_send_synack+0x5c/0x450\n     tcp_rtx_synack+0xeb/0x1f0\n     inet_rtx_syn_ack+0x34/0x60\n     tcp_check_req+0x3af/0x9e0\n     tcp_rcv_state_process+0x59b/0x2030\n     tcp_v6_do_rcv+0x5f5/0x700\n     release_sock+0x3a/0xf0\n     tcp_sendmsg+0x33/0x40\n     ____sys_sendmsg+0x2f2/0x490\n     __sys_sendmsg+0x184/0x230\n     do_syscall_64+0x3d/0x90\n\nAvoid calling __TCP_INC_STATS() with will touch per-cpu variables. Use\nTCP_INC_STATS() which is safe to be called from context switch."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv4/tcp_output.c"
                    ],
                    "versions": [
                        {
                            "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
                            "lessThan": "d493d4fe88195a144d6a277a90062a7534ed2192",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
                            "lessThan": "e23ca307745be3df7fe9762f3e2a7e311a57852e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
                            "lessThan": "442aa78ed70188b21ccd8669738448702c0a3281",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
                            "lessThan": "77ad58bca0119e8cc3e0e9d91a3f22caa66e4dfa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
                            "lessThan": "ad07290d63ff6689f50565b02f5b6f34ec15a5ca",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
                            "lessThan": "9180aa4622a720b433e842b4d3aa34d73eec577a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
                            "lessThan": "7613cde8c0c1f02a7ec2e1d536c01b65b135fc1c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
                            "lessThan": "bced3f7db95ff2e6ca29dc4d1c9751ab5e736a09",
                            "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/tcp_output.c"
                    ],
                    "versions": [
                        {
                            "version": "3.7",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.7",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.14.311",
                            "lessThanOrEqual": "4.14.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.19.279",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.238",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.176",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.104",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.21",
                            "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": "3.7",
                                    "versionEndExcluding": "4.14.311"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "4.19.279"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "5.4.238"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "5.10.176"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "5.15.104"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "6.1.21"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "6.2.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "6.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d493d4fe88195a144d6a277a90062a7534ed2192"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e23ca307745be3df7fe9762f3e2a7e311a57852e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/442aa78ed70188b21ccd8669738448702c0a3281"
                },
                {
                    "url": "https://git.kernel.org/stable/c/77ad58bca0119e8cc3e0e9d91a3f22caa66e4dfa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ad07290d63ff6689f50565b02f5b6f34ec15a5ca"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9180aa4622a720b433e842b4d3aa34d73eec577a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7613cde8c0c1f02a7ec2e1d536c01b65b135fc1c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bced3f7db95ff2e6ca29dc4d1c9751ab5e736a09"
                }
            ],
            "title": "tcp: tcp_make_synack() can be called from process context",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}