{"id":"CVE-2026-74377","title":"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.…","summary":"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.…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-20"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 7","enterprise_linux 8","enterprise_linux 9"],"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:17:42.683","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74377","references":[{"url":"https://git.kernel.org/stable/c/2e60378fb3c8b51c94103bb40014c4fe38fa5033","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5420eebf3b3c162bfaf965f30e61cd1d689e5732","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9fa785137303f7109c23dea779b8dedc67c9b531","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a211b7904aed365e4e4f08a48ec6e6dd1ea7b16b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d6ab440240a04b8737ee4c7bb21af9182e451733","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74377.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-74377"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516773"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74377"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74377"},{"url":"https://kernelcve.org/list/?q=CVE-2026-74377"},{"url":"https://lore.kernel.org/linux-cve-announce/2026081504-CVE-2026-74377-9467@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00129,"epssPercentile":0.02543,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:54:49.610673Z"},"scores":{"nvd":7.8,"vendor":4.7,"cna":7.8},"ingestedAt":"2026-10-16T19:46:24.372Z","slug":"CVE-2026-74377","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74377.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":230345,"id":"CVE-2026-74377","ts":1793130919310,"field":"cvss","old":"4.7","new":"7.8"},{"seq":230344,"id":"CVE-2026-74377","ts":1793130919310,"field":"severity","old":"medium","new":"high"},{"seq":229376,"id":"CVE-2026-74377","ts":1793019722405,"field":"cvss","old":"7.8","new":"4.7"},{"seq":229375,"id":"CVE-2026-74377","ts":1793019722405,"field":"severity","old":"high","new":"medium"}]}