---
title: "CVE-2026-89526: Linux kernel svcrdma - Buffer Over-read"
description: "Linux kernel svcrdma contains a buffer over-read caused by improper validation of RPC/RDMA Read chunk positions, letting remote clients cause memory corruption or information disclosure, exploit requires crafted RPC/RDMA requests."
url: https://panop.io/threat-heartbeat/CVE-2026-89526/
---

# CVE-2026-89526 Linux kernel svcrdma - Buffer Over-read

Linux kernel svcrdma contains a buffer over-read caused by improper validation of RPC/RDMA Read chunk positions, letting remote clients cause memory corruption or information disclosure, exploit requires crafted RPC/RDMA requests.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.64% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89526)

## Details

Type

Buffer Over-read

Impact

Information Disclosure, Denial Of Service

CVSS vector

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

Published

11 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-2026-89526](https://nvd.nist.gov/vuln/detail/CVE-2026-89526)
- [https://git.kernel.org/stable/c/3779b7b9e7d1c8ba4738f9d327de3b0288cefe9b](https://git.kernel.org/stable/c/3779b7b9e7d1c8ba4738f9d327de3b0288cefe9b)
- [https://git.kernel.org/stable/c/577097455d084610fc31e91e6a61c5793b6f04ba](https://git.kernel.org/stable/c/577097455d084610fc31e91e6a61c5793b6f04ba)
- [https://git.kernel.org/stable/c/5ab3f6d882fe07ae5e61d0bcfeea00b9409155c2](https://git.kernel.org/stable/c/5ab3f6d882fe07ae5e61d0bcfeea00b9409155c2)
- [https://git.kernel.org/stable/c/f84ec84d8d4bc65f9ae23372570349687f66fa39](https://git.kernel.org/stable/c/f84ec84d8d4bc65f9ae23372570349687f66fa39)

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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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