{"id":"CVE-2025-23145","revision":"7d931d6f43f7411f8734859aa8dd3a21","records":[{"revision":"7d931d6f43f7411f8734859aa8dd3a21","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-23145","aliases":[],"title":"mptcp: fix NULL pointer in can_accept_new_subflow","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix NULL pointer in can_accept_new_subflow\n\nWhen testing valkey benchmark tool with MPTCP, the kernel panics in\n'mptcp_can_accept_new_subflow' because subflow_req->msk is NULL.\n\nCall trace:\n\n  mptcp_can_accept_new_subflow (./net/mptcp/subflow.c:63 (discriminator 4)) (P)\n  subflow_syn_recv_sock (./net/mptcp/subflow.c:854)\n  tcp_check_req (./net/ipv4/tcp_minisocks.c:863)\n  tcp_v4_rcv (./net/ipv4/tcp_ipv4.c:2268)\n  ip_protocol_deliver_rcu (./net/ipv4/ip_input.c:207)\n  ip_local_deliver_finish (./net/ipv4/ip_input.c:234)\n  ip_local_deliver (./net/ipv4/ip_input.c:254)\n  ip_rcv_finish (./net/ipv4/ip_input.c:449)\n  ...\n\nAccording to the debug log, the same req received two SYN-ACK in a very\nshort time, very likely because the client retransmits the syn ack due\nto multiple reasons.\n\nEven if the packets are transmitted with a relevant time interval, they\ncan be processed by the server on different CPUs concurrently). The\n'subflow_req->msk' ownership is transferred to the subflow the first,\nand there will be a risk of a null pointer dereference here.\n\nThis patch fixes this issue by moving the 'subflow_req->msk' under the\n`own_req == true` conditional.\n\nNote that the !msk check in subflow_hmac_valid() can be dropped, because\nthe same check already exists under the own_req mpj branch where the\ncode has been moved to.","state":0,"publishedAt":"2025-05-01T12:55:34.622+00:00","modifiedAt":"2026-10-15T21:51:58.841+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/subflow.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"9466a1ccebbe54ac57fb8a89c2b4b854826546a8\",\n                            \"lessThan\": \"8cf7fef1bb2ffea7792bcbf71ca00216cecc725d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9466a1ccebbe54ac57fb8a89c2b4b854826546a8\",\n                            \"lessThan\": \"b3088bd2a6790c8efff139d86d7a9d0b1305977b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9466a1ccebbe54ac57fb8a89c2b4b854826546a8\",\n                            \"lessThan\": \"855bf0aacd51fced11ea9aa0d5101ee0febaeadb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9466a1ccebbe54ac57fb8a89c2b4b854826546a8\",\n                            \"lessThan\": \"7f9ae060ed64aef8f174c5f1ea513825b1be9af1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9466a1ccebbe54ac57fb8a89c2b4b854826546a8\",\n                            \"lessThan\": \"dc81e41a307df523072186b241fa8244fecd7803\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9466a1ccebbe54ac57fb8a89c2b4b854826546a8\",\n                            \"lessThan\": \"efd58a8dd9e7a709a90ee486a4247c923d27296f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9466a1ccebbe54ac57fb8a89c2b4b854826546a8\",\n                            \"lessThan\": \"4b2649b9717678aeb097893cc49f59311a1ecab0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9466a1ccebbe54ac57fb8a89c2b4b854826546a8\",\n                            \"lessThan\": \"443041deb5ef6a1289a99ed95015ec7442f141dc\",\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/subflow.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.237\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.181\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.135\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.88\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.24\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.13.12\",\n                            \"lessThanOrEqual\": \"6.13.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.14.3\",\n                            \"lessThanOrEqual\": \"6.14.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.15\",\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/8cf7fef1bb2ffea7792bcbf71ca00216cecc725d","https://git.kernel.org/stable/c/b3088bd2a6790c8efff139d86d7a9d0b1305977b","https://git.kernel.org/stable/c/855bf0aacd51fced11ea9aa0d5101ee0febaeadb","https://git.kernel.org/stable/c/7f9ae060ed64aef8f174c5f1ea513825b1be9af1","https://git.kernel.org/stable/c/dc81e41a307df523072186b241fa8244fecd7803","https://git.kernel.org/stable/c/efd58a8dd9e7a709a90ee486a4247c923d27296f","https://git.kernel.org/stable/c/4b2649b9717678aeb097893cc49f59311a1ecab0","https://git.kernel.org/stable/c/443041deb5ef6a1289a99ed95015ec7442f141dc"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-23145","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-23145","identifiers":["CVE-2025-23145"]},"retained":false,"historicalAffected":[]}],"coverage":[]}