---
title: "CVE-2026-98365: Linux kernel RDMA/rxe - Integer Overflow"
description: "Linux kernel RDMA/rxe contains an integer overflow in mr_check_range() caused by wraparound-prone arithmetic, letting remote unauthenticated peers trigger out-of-bounds read/write and kernel crash, exploit requires crafted RDMA-Write/Read RETH."
url: https://panop.io/threat-heartbeat/CVE-2026-98365/
---

# CVE-2026-98365 Linux kernel RDMA/rxe - Integer Overflow

Linux kernel RDMA/rxe contains an integer overflow in mr\_check\_range() caused by wraparound-prone arithmetic, letting remote unauthenticated peers trigger out-of-bounds read/write and kernel crash, exploit requires crafted RDMA-Write/Read RETH.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.38% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-98365)

## Details

Type

Integer Overflow

Impact

Denial Of Service, Out Of Bounds Rw

CVSS vector

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

Published

6 October 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for mr\_check\_range() integer overflow.

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-2026-98365](https://nvd.nist.gov/vuln/detail/CVE-2026-98365)
- [https://git.kernel.org/stable/c/2f3b705144e3a3c14184fec6e354680081fe91ec](https://git.kernel.org/stable/c/2f3b705144e3a3c14184fec6e354680081fe91ec)
- [https://git.kernel.org/stable/c/3431f525718f6b07da308cda6d44f8cb548bbd37](https://git.kernel.org/stable/c/3431f525718f6b07da308cda6d44f8cb548bbd37)
- [https://git.kernel.org/stable/c/5d9426a74fc8cb8f375fcdc19b465a030f9b8cab](https://git.kernel.org/stable/c/5d9426a74fc8cb8f375fcdc19b465a030f9b8cab)
- [https://git.kernel.org/stable/c/b7d2118660545a00b21e83010ded1a231c6fb8c5](https://git.kernel.org/stable/c/b7d2118660545a00b21e83010ded1a231c6fb8c5)
- [https://git.kernel.org/stable/c/d10e2a08799e858d3e71ea4169bcd018f216d444](https://git.kernel.org/stable/c/d10e2a08799e858d3e71ea4169bcd018f216d444)

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## 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

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