---
title: "CVE-2026-89530: Linux Kernel svcrdma - Buffer Overflow"
description: "Linux kernel svcrdma contains a buffer overflow caused by improper handling of inline replies that exceed the pull-up buffer size, letting remote RPC-over-RDMA clients cause memory corruption, exploit requires crafted RPC requests without Write list or Reply chunk."
url: https://panop.io/threat-heartbeat/CVE-2026-89530/
---

# CVE-2026-89530 Linux Kernel svcrdma - Buffer Overflow

Linux kernel svcrdma contains a buffer overflow caused by improper handling of inline replies that exceed the pull-up buffer size, letting remote RPC-over-RDMA clients cause memory corruption, exploit requires crafted RPC requests without Write list or Reply chunk.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.46% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89530)

## Details

Type

Buffer Overflow

Impact

Denial Of Service, Remote Code Execution

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 for this vulnerability.

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-2026-89530](https://nvd.nist.gov/vuln/detail/CVE-2026-89530)
- [https://git.kernel.org/stable/c/0fbe20dfe74b783d255bf389a6ea77aa25dc7860](https://git.kernel.org/stable/c/0fbe20dfe74b783d255bf389a6ea77aa25dc7860)
- [https://git.kernel.org/stable/c/1949dd1576f7a8aa161b1330c6125df9d53046d5](https://git.kernel.org/stable/c/1949dd1576f7a8aa161b1330c6125df9d53046d5)
- [https://git.kernel.org/stable/c/8ec60eb51fae37cd3d334ff26e4a7d6fb21ff7cf](https://git.kernel.org/stable/c/8ec60eb51fae37cd3d334ff26e4a7d6fb21ff7cf)
- [https://git.kernel.org/stable/c/fcd91b9957462d398792201c239dffaeff1cc8b2](https://git.kernel.org/stable/c/fcd91b9957462d398792201c239dffaeff1cc8b2)

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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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