---
title: "CVE-2026-99032: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability caused by dereferencing smc->clcsock without proper locking in smc_getname, letting local attackers cause crashes or undefined behavior, exploit requires concurrent socket termination."
url: https://panop.io/threat-heartbeat/CVE-2026-99032/
---

# CVE-2026-99032 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability caused by dereferencing smc->clcsock without proper locking in smc\_getname, letting local attackers cause crashes or undefined behavior, exploit requires concurrent socket termination.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.21% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-99032)

## Details

Type

Use After Free

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

23 October 2026

Updated

25 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for smc\_getname locking.

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-2026-99032](https://nvd.nist.gov/vuln/detail/CVE-2026-99032)
- [https://git.kernel.org/stable/c/1512e3714b3946bda75a160a34f22a51710daa43](https://git.kernel.org/stable/c/1512e3714b3946bda75a160a34f22a51710daa43)
- [https://git.kernel.org/stable/c/64a6b36b0e1855288080bc5f89769f27d6dc03c8](https://git.kernel.org/stable/c/64a6b36b0e1855288080bc5f89769f27d6dc03c8)
- [https://git.kernel.org/stable/c/6a1833f0d7dc037c8e876b9178ba69d5d107c086](https://git.kernel.org/stable/c/6a1833f0d7dc037c8e876b9178ba69d5d107c086)
- [https://git.kernel.org/stable/c/c223da71abfaea2ebb1c7208ae9ebf15038f9388](https://git.kernel.org/stable/c/c223da71abfaea2ebb1c7208ae9ebf15038f9388)
- [https://git.kernel.org/stable/c/e607017a553d2a48e428ec8b8ffb06bf3bb92ce9](https://git.kernel.org/stable/c/e607017a553d2a48e428ec8b8ffb06bf3bb92ce9)

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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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