{"id":"CVE-2026-52989","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-52989","summary":"nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers","details":"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.","published":"2026-06-24T16:29:03.398Z","modified":"2026-08-27T18:26:11.165327300Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.00356,"percentile":0.28952,"asOf":"2026-09-13"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.1.175"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/046fa5c72d15cd8e2d592e275697ea399d8f76b0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3df42a854686fa06484e37ac1a3931c8e3e3453c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c2a11441538bdbbc5aa003f190995eba93a89b88"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d7c8f95f599b3b38a717d2e771c3f8c174f657c3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ea8e356acb165cb1fd75537a52e1f66e5e76c538"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f9204a2b78dd18374d3bcf9bf93d9021ce22de1b"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52989.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-52989"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52989.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52989"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492443"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T18:26:11.165327300Z"}}