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CVE-2026-74378

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe get_srq_wqe() reads wqe->dma.num_sge from the shared receive queue buffer, wh…

Published Aug 15, 2026EPSS 0.14%

Overview

CVE-2026-74378 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: Fix TOCTOU heap overflow in get_srq_wqe

get_srq_wqe() reads wqe->dma.num_sge from the shared receive queue

buffer, which is mapped into userspace. It validates num_sge against

max_sge, but then re-reads the same field to calculate the memcpy

size. A concurrent userspace thread can modify num_sge between

validation and use, causing a heap buffer overflow when copying the

WQE into qp->resp.srq_wqe.

Read num_sge into a local variable and use it for both the bounds

check and the size calculation.

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/02558c86b6b761063e9399e6b939984500327ef1Refgit.kernel.org/stable/c/22b8fbded65b8c441b634a185f8da67657df6c50Refgit.kernel.org/stable/c/3cfa2a3adc51b7c57729961a03446962ff10e3d2Refgit.kernel.org/stable/c/3e07ea9579dc9553d2285c26c2823931358aa3b8Refgit.kernel.org/stable/c/b9800d7953d119bcc068c74587d48e4ba0313629Refgit.kernel.org/stable/c/cd19a6345e3727adafafa5954b58b13c92e13b80

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74378?

CVE-2026-74378 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-2026-74378?

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-2026-74378?

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-2026-74378?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74378 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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