---
title: "CVE-2026-80952: Linux Kernel i3c Master - Use After Free & Information Disclosure"
description: "Linux kernel i3c master contains an information leak and use-after-free caused by clearing device descriptor before device_unregister(), letting attackers leak kernel stack contents and cause use-after-free during device unregistration, exploit requires race condition during device unbind."
url: https://panop.io/threat-heartbeat/CVE-2026-80952/
---

# CVE-2026-80952 Linux Kernel i3c Master - Use After Free & Information Disclosure

Linux kernel i3c master contains an information leak and use-after-free caused by clearing device descriptor before device\_unregister(), letting attackers leak kernel stack contents and cause use-after-free during device unregistration, exploit requires race condition during device unbind.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.13% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-80952)

## Details

Type

Use After Free

Impact

Information Disclosure, Use After Free

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/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-2026-80952](https://nvd.nist.gov/vuln/detail/CVE-2026-80952)
- [https://git.kernel.org/stable/c/334cfb5e285cece5dc49fb3fb8ea9b70b2cb5d7e](https://git.kernel.org/stable/c/334cfb5e285cece5dc49fb3fb8ea9b70b2cb5d7e)
- [https://git.kernel.org/stable/c/c64daaaba08e490c8347ff60aacac4dd51249f91](https://git.kernel.org/stable/c/c64daaaba08e490c8347ff60aacac4dd51249f91)
- [https://git.kernel.org/stable/c/ef72ff6650c4ebf2b444708d84df66db42f262d9](https://git.kernel.org/stable/c/ef72ff6650c4ebf2b444708d84df66db42f262d9)
- [https://git.kernel.org/stable/c/4837be0f9ac2efe5e83b35a696b6242c473d280c](https://git.kernel.org/stable/c/4837be0f9ac2efe5e83b35a696b6242c473d280c)
- [https://git.kernel.org/stable/c/94fb9786d67a8f8b899e77381620f86bad94fdf7](https://git.kernel.org/stable/c/94fb9786d67a8f8b899e77381620f86bad94fdf7)
- [https://git.kernel.org/stable/c/c16b6f25e0cc2dd1055dde1256cbf5a9e888cf49](https://git.kernel.org/stable/c/c16b6f25e0cc2dd1055dde1256cbf5a9e888cf49)
- [https://git.kernel.org/stable/c/d2c743efd2d1ee64e94324664808f623dd865872](https://git.kernel.org/stable/c/d2c743efd2d1ee64e94324664808f623dd865872)
- [https://git.kernel.org/stable/c/109995153898454c7795c2c299fd0a0b57456a4b](https://git.kernel.org/stable/c/109995153898454c7795c2c299fd0a0b57456a4b)

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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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