{"api_version":"1","generated_at":"2026-07-25T00:15:39+00:00","cve":"CVE-2026-52989","urls":{"html":"https://cve.report/CVE-2026-52989","api":"https://cve.report/api/cve/CVE-2026-52989.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-52989","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-52989"},"summary":{"title":"nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers\n\nCurrently, when nvmet_tcp_build_pdu_iovec() detects an out-of-bounds\nPDU length or offset, it triggers nvmet_tcp_fatal_error(cmd->queue)\nand returns early. However, because the function returns void, the\ncallers are entirely unaware that a fatal error has occurred and\nthat the cmd->recv_msg.msg_iter was left uninitialized.\n\nCallers such as nvmet_tcp_handle_h2c_data_pdu() proceed to blindly\noverwrite the queue state with queue->rcv_state = NVMET_TCP_RECV_DATA\nConsequently, the socket receiving loop may attempt to read incoming\nnetwork data into the uninitialized iterator.\n\nFix this by shifting the error handling responsibility to the callers.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 17:17:09","updated_at":"2026-07-15 01:16:25"},"problem_types":["CWE-908","CWE-390","CWE-390 Detection of Error Condition Without 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propagate nvmet_tcp_build_pdu_iovec() errors to its c","CVE":"CVE-2026-52989","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"52989","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers\n\nCurrently, when nvmet_tcp_build_pdu_iovec() detects an out-of-bounds\nPDU length or offset, it triggers nvmet_tcp_fatal_error(cmd->queue)\nand returns early. However, because the function returns void, the\ncallers are entirely unaware that a fatal error has occurred and\nthat the cmd->recv_msg.msg_iter was left uninitialized.\n\nCallers such as nvmet_tcp_handle_h2c_data_pdu() proceed to blindly\noverwrite the queue state with queue->rcv_state = NVMET_TCP_RECV_DATA\nConsequently, the socket receiving loop may attempt to read incoming\nnetwork data into the uninitialized iterator.\n\nFix this by shifting the error handling responsibility to the callers.","Type":"Description","Title":"nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its c"}]}}}