RDMA/rxe: Copy WQE to local buffer in non-SRQ receive path
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.1.178, 6.12.97, 6.18.40, 6.6.145, 7.1.5
- CVEs
- CVE-2026-74377
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 13:21 UTC · Revision 1
Source evidence
RDMA/rxe: Copy WQE to local buffer in non-SRQ receive path
core-osv · Original sourcePublished 15 Aug 2026, 05:58 UTC
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.
osv:CVE-2026-74377
Kernel
Fixed versions: 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5
Complete source record
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"url": "https://osv.dev/vulnerability/CVE-2026-74377",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "RDMA/rxe: Copy WQE to local buffer in non-SRQ receive path",
"summary": "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.",
"evidence": "osv:CVE-2026-74377",
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"modified": "2026-10-28T02:30:28.786196269Z",
"provider": "osv",
"references": [
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"https://git.kernel.org/stable/c/5420eebf3b3c162bfaf965f30e61cd1d689e5732",
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"https://git.kernel.org/stable/c/fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74377.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-74377",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"security_relevant": true,
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"source_id": "core-osv",
"document_id": 495804,
"published_at": "2026-08-15T05:58:55.704+00:00"
}