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CVE-2026-74377
RDMA/rxe: Copy WQE to local buffer in non-SRQ receive path
Overview
Description

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.

Details
INFO

Published Date :

Aug. 15, 2026, 6:22 a.m.

Last Modified :

Aug. 15, 2026, 6:22 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-74377 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

: Total Affected Vendor : 0 | Products : 0
Solution
Copy received work queue elements to a kernel buffer before processing to prevent out-of-bounds reads.
  • Copy WQE to a kernel-local buffer before processing.
  • Validate num_sge before copying WQE.
  • Apply relevant kernel patches for RDMA/rxe component.
  • Test the fix in a non-production environment.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-74377.

URL Resource
https://git.kernel.org/stable/c/2e60378fb3c8b51c94103bb40014c4fe38fa5033
https://git.kernel.org/stable/c/5420eebf3b3c162bfaf965f30e61cd1d689e5732
https://git.kernel.org/stable/c/9fa785137303f7109c23dea779b8dedc67c9b531
https://git.kernel.org/stable/c/a211b7904aed365e4e4f08a48ec6e6dd1ea7b16b
https://git.kernel.org/stable/c/d6ab440240a04b8737ee4c7bb21af9182e451733
https://git.kernel.org/stable/c/fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-74377 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-74377 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-74377 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-74377 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 15, 2026

    Action Type Old Value New Value
    Added Affected [{'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-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/infiniband/sw/rxe/rxe_resp.c'], 'defaultStatus': 'affected'}]
    Added Description 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.
    Added Reference https://git.kernel.org/stable/c/2e60378fb3c8b51c94103bb40014c4fe38fa5033
    Added Reference https://git.kernel.org/stable/c/5420eebf3b3c162bfaf965f30e61cd1d689e5732
    Added Reference https://git.kernel.org/stable/c/9fa785137303f7109c23dea779b8dedc67c9b531
    Added Reference https://git.kernel.org/stable/c/a211b7904aed365e4e4f08a48ec6e6dd1ea7b16b
    Added Reference https://git.kernel.org/stable/c/d6ab440240a04b8737ee4c7bb21af9182e451733
    Added Reference https://git.kernel.org/stable/c/fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
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