In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe get_srq_wqe() rea…
CVE-2026-74378 · published 15 Aug 2026
How serious is it
- Severity: high, CVSS score 7.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-74378?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 4.8
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/02558c86b6b761063e9399e6b939984500327ef1
- git.kernel.org/stable/c/22b8fbded65b8c441b634a185f8da67657df6c50
- git.kernel.org/stable/c/3cfa2a3adc51b7c57729961a03446962ff10e3d2
- git.kernel.org/stable/c/3e07ea9579dc9553d2285c26c2823931358aa3b8
- git.kernel.org/stable/c/b9800d7953d119bcc068c74587d48e4ba0313629
- git.kernel.org/stable/c/c8db0e5ab0b6c540214c46c56aaac7cbcb0967fe
- git.kernel.org/stable/c/cd19a6345e3727adafafa5954b58b13c92e13b80
- git.kernel.org/stable/c/e48daa94ad2d406225b73491fc935064716f0ec7
Merged from NVD. Last updated 24 Oct 2026. All vulnerabilities · RSS · JSON