CVE-2026-74377RDMA/rxe: Copy WQE to local buffer in non-SRQ receive path
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Copy WQE to local buffer in non-SRQ receive path For non-SRQ QPs, the responder reads WQE fields directly from the shared queue buffer mapped into userspace. This allows a malicious user to modify fields like num_sge or sge entries while the kernel is processing the WQE, leading to out-of-bounds reads in rxe_resp_check_length() and copy_data(). Introduce get_recv_wqe() that validates num_sge and copies the WQE to a kernel-local buffer before processing, matching the approach already used for SRQ WQEs in get_srq_wqe(). The srq_wqe buffer is reused since SRQ and non-SRQ paths are mutually exclusive per QP.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 8700e3e7c4857d28ebaa824509934556da0b3e76 builds before 2e60378fb3c8b51c94103bb40014c4fe38fa5033; from 8700e3e7c4857d28ebaa824509934556da0b3e76 before fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78; 8700e3e7c4857d28ebaa824509934556da0b3e76 builds before 9fa785137303f7109c23dea779b8dedc67c9b531; 8700e3e7c4857d28ebaa824509934556da0b3e76 builds before 5420eebf3b3c162bfaf965f30e61cd1d689e5732; from 8700e3e7c4857d28ebaa824509934556da0b3e76 before a211b7904aed365e4e4f08a48ec6e6dd1ea7b16b; from 8700e3e7c4857d28ebaa824509934556da0b3e76 before d6ab440240a04b8737ee4c7bb21af9182e451733 | CNA record |
References
- https://git.kernel.org/stable/c/2e60378fb3c8b51c94103bb40014c4fe38fa5033
- https://git.kernel.org/stable/c/fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78
- https://git.kernel.org/stable/c/9fa785137303f7109c23dea779b8dedc67c9b531
- https://git.kernel.org/stable/c/5420eebf3b3c162bfaf965f30e61cd1d689e5732
- https://git.kernel.org/stable/c/a211b7904aed365e4e4f08a48ec6e6dd1ea7b16b
- https://git.kernel.org/stable/c/d6ab440240a04b8737ee4c7bb21af9182e451733
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.