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.
CVE-2026-74377
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-74377
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"lessThan": "2e60378fb3c8b51c94103bb40014c4fe38fa5033",
"versionType": "git"
},
{
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"lessThan": "fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78",
"versionType": "git"
},
{
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"lessThan": "9fa785137303f7109c23dea779b8dedc67c9b531",
"versionType": "git"
},
{
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"lessThan": "5420eebf3b3c162bfaf965f30e61cd1d689e5732",
"versionType": "git"
},
{
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"lessThan": "a211b7904aed365e4e4f08a48ec6e6dd1ea7b16b",
"versionType": "git"
},
{
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"lessThan": "d6ab440240a04b8737ee4c7bb21af9182e451733",
"versionType": "git"
}
],
"programFiles": [
"drivers/infiniband/sw/rxe/rxe_resp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/infiniband/sw/rxe/rxe_resp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74377
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33114 · Revision 1
- Added to Heist Feed
- Publisher date