{"id":"CVE-2023-54085","summary":"mptcp: fix NULL pointer dereference on fastopen early fallback","details":"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.","modified":"2026-03-20T12:33:26.228614Z","published":"2025-12-24T13:06:16.161Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54085.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/95135835519b0ab931c39908b2c99e9fb3c9068b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c0ff6f6da66a7791a32c0234388b1bdc00244917"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54085.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54085"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"36b122baf6a8bd46b4a591f12f4ed17b22257408"},{"fixed":"95135835519b0ab931c39908b2c99e9fb3c9068b"},{"fixed":"c0ff6f6da66a7791a32c0234388b1bdc00244917"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54085.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.2.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54085.json"}}],"schema_version":"1.7.5"}