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CVE-2026-74377

7.8 · HIGH

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 sh…

Published Aug 15, 2026EPSS 0.13%

Overview

CVE-2026-74377 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/2e60378fb3c8b51c94103bb40014c4fe38fa5033Refgit.kernel.org/stable/c/5420eebf3b3c162bfaf965f30e61cd1d689e5732Refgit.kernel.org/stable/c/9fa785137303f7109c23dea779b8dedc67c9b531Refgit.kernel.org/stable/c/a211b7904aed365e4e4f08a48ec6e6dd1ea7b16bRefgit.kernel.org/stable/c/d6ab440240a04b8737ee4c7bb21af9182e451733Refgit.kernel.org/stable/c/fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74377?

CVE-2026-74377 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-74377?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-74377?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-74377?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74377 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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