---
title: "CVE-2026-93037: Linux Kernel RDMA/hfi1 - Broken Authentication"
description: "Linux kernel RDMA/hfi1 contains a broken authentication caused by set_txreq_header_ahg() ignoring sdma_txinit_ahg() errors, letting attackers cause improper request processing, exploit requires kernel-level access."
url: https://panop.io/threat-heartbeat/CVE-2026-93037/
---

# CVE-2026-93037 Linux Kernel RDMA/hfi1 - Broken Authentication

Linux kernel RDMA/hfi1 contains a broken authentication caused by set\_txreq\_header\_ahg() ignoring sdma\_txinit\_ahg() errors, letting attackers cause improper request processing, exploit requires kernel-level access.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93037)

## Details

Type

Broken Authentication

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-93037](https://nvd.nist.gov/vuln/detail/CVE-2026-93037)
- [https://git.kernel.org/stable/c/5b7cefffd15d87c8103865f887cdcf9077d8094b](https://git.kernel.org/stable/c/5b7cefffd15d87c8103865f887cdcf9077d8094b)
- [https://git.kernel.org/stable/c/bf974994150cfd14bfc599748925f4d426e00d90](https://git.kernel.org/stable/c/bf974994150cfd14bfc599748925f4d426e00d90)
- [https://git.kernel.org/stable/c/ca99431820e8cac19f6a091c04da54cbe8d64f52](https://git.kernel.org/stable/c/ca99431820e8cac19f6a091c04da54cbe8d64f52)
- [https://git.kernel.org/stable/c/cb73c2fe6e9cf563c99f22b7c8bca0d5f70d603e](https://git.kernel.org/stable/c/cb73c2fe6e9cf563c99f22b7c8bca0d5f70d603e)
- [https://git.kernel.org/stable/c/fd6dee13f3857259b6b2ddd28e1ed95fd94ae2f9](https://git.kernel.org/stable/c/fd6dee13f3857259b6b2ddd28e1ed95fd94ae2f9)
- [https://git.kernel.org/stable/c/091c6162c022cbdfb64219708a71728cfd1d4600](https://git.kernel.org/stable/c/091c6162c022cbdfb64219708a71728cfd1d4600)
- [https://git.kernel.org/stable/c/122a730675565ff2ad210537c3fc3afb8291d482](https://git.kernel.org/stable/c/122a730675565ff2ad210537c3fc3afb8291d482)
- [https://git.kernel.org/stable/c/3416db552eb378e54cb2f2ce0db5f0df88654bda](https://git.kernel.org/stable/c/3416db552eb378e54cb2f2ce0db5f0df88654bda)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)