---
title: "CVE-2026-80928: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability in smack_file_send_sigiotask() caused by improper access to task credentials, letting attackers cause memory corruption, exploit requires triggering specific task credential inspection."
url: https://panop.io/threat-heartbeat/CVE-2026-80928/
---

# CVE-2026-80928 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability in smack\_file\_send\_sigiotask() caused by improper access to task credentials, letting attackers cause memory corruption, exploit requires triggering specific task credential inspection.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.13% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-80928)

## Details

Type

Use After Free

Impact

Privilege Escalation, 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

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for smack\_file\_send\_sigiotask()

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-2026-80928](https://nvd.nist.gov/vuln/detail/CVE-2026-80928)
- [https://git.kernel.org/stable/c/ed64aa505875a3b4defd504ee8e59e1949246a62](https://git.kernel.org/stable/c/ed64aa505875a3b4defd504ee8e59e1949246a62)
- [https://git.kernel.org/stable/c/fedc88e38ce979a720cd2de042578cb5df3dc8de](https://git.kernel.org/stable/c/fedc88e38ce979a720cd2de042578cb5df3dc8de)
- [https://git.kernel.org/stable/c/7c7fe043f3099d0d35002b248967f75e55345b93](https://git.kernel.org/stable/c/7c7fe043f3099d0d35002b248967f75e55345b93)
- [https://git.kernel.org/stable/c/a512366d84e134a9eefc2cc40eeb6e80e2ec162c](https://git.kernel.org/stable/c/a512366d84e134a9eefc2cc40eeb6e80e2ec162c)
- [https://git.kernel.org/stable/c/f9c7b1f2b9d8f4176d2632743f51400855978ace](https://git.kernel.org/stable/c/f9c7b1f2b9d8f4176d2632743f51400855978ace)
- [https://git.kernel.org/stable/c/b5bcf3adfa27279da4401ab8f1e1a706601a92be](https://git.kernel.org/stable/c/b5bcf3adfa27279da4401ab8f1e1a706601a92be)
- [https://git.kernel.org/stable/c/b791401bf389a1546a830d2b381ca60fe94c7870](https://git.kernel.org/stable/c/b791401bf389a1546a830d2b381ca60fe94c7870)

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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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