{"id":"CVE-2023-54085","revision":"3009652c4c0c426eafb412efc8432459","records":[{"revision":"3009652c4c0c426eafb412efc8432459","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-54085","aliases":[],"title":"mptcp: fix NULL pointer dereference on fastopen early fallback","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix NULL pointer dereference on fastopen early fallback\n\nIn case of early fallback to TCP, subflow_syn_recv_sock() deletes\nthe subflow context before returning the newly allocated sock to\nthe caller.\n\nThe fastopen path does not cope with the above unconditionally\ndereferencing the subflow context.","state":0,"publishedAt":"2025-12-24T13:06:16.161+00:00","modifiedAt":"2026-10-15T21:41:39.088+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/mptcp/fastopen.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"36b122baf6a8bd46b4a591f12f4ed17b22257408\",\n                            \"lessThan\": \"95135835519b0ab931c39908b2c99e9fb3c9068b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"36b122baf6a8bd46b4a591f12f4ed17b22257408\",\n                            \"lessThan\": \"c0ff6f6da66a7791a32c0234388b1bdc00244917\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/mptcp/fastopen.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.2.12\",\n                            \"lessThanOrEqual\": \"6.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/95135835519b0ab931c39908b2c99e9fb3c9068b","https://git.kernel.org/stable/c/c0ff6f6da66a7791a32c0234388b1bdc00244917"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-54085","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-54085","identifiers":["CVE-2023-54085"]},"retained":false,"historicalAffected":[]}],"coverage":[]}