{"id":"CVE-2026-74377","summary":"RDMA/rxe: Copy WQE to local buffer in non-SRQ receive path","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Copy WQE to local buffer in non-SRQ receive path\n\nFor non-SRQ QPs, the responder reads WQE fields directly from the\nshared queue buffer mapped into userspace. This allows a malicious\nuser to modify fields like num_sge or sge entries while the kernel\nis processing the WQE, leading to out-of-bounds reads in\nrxe_resp_check_length() and copy_data().\n\nIntroduce get_recv_wqe() that validates num_sge and copies the WQE\nto a kernel-local buffer before processing, matching the approach\nalready used for SRQ WQEs in get_srq_wqe(). The srq_wqe buffer is\nreused since SRQ and non-SRQ paths are mutually exclusive per QP.","modified":"2026-08-18T03:56:29.388487038Z","published":"2026-08-15T05:58:55.704Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74377.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2e60378fb3c8b51c94103bb40014c4fe38fa5033"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5420eebf3b3c162bfaf965f30e61cd1d689e5732"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9fa785137303f7109c23dea779b8dedc67c9b531"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a211b7904aed365e4e4f08a48ec6e6dd1ea7b16b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d6ab440240a04b8737ee4c7bb21af9182e451733"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74377.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74377"},{"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":"8700e3e7c4857d28ebaa824509934556da0b3e76"},{"fixed":"2e60378fb3c8b51c94103bb40014c4fe38fa5033"},{"fixed":"fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78"},{"fixed":"9fa785137303f7109c23dea779b8dedc67c9b531"},{"fixed":"5420eebf3b3c162bfaf965f30e61cd1d689e5732"},{"fixed":"a211b7904aed365e4e4f08a48ec6e6dd1ea7b16b"},{"fixed":"d6ab440240a04b8737ee4c7bb21af9182e451733"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74377.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.8.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74377.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}