---
title: "CVE-2026-90312: Linux Kernel - Type Confusion"
description: "Linux kernel contains a type confusion vulnerability in BPF load-acquire operations caused by improper source pointer type validation, letting attackers access raw kernel objects, exploit requires BPF program with specific load-acquire instructions."
url: https://panop.io/threat-heartbeat/CVE-2026-90312/
---

# CVE-2026-90312 Linux Kernel - Type Confusion

Linux kernel contains a type confusion vulnerability in BPF load-acquire operations caused by improper source pointer type validation, letting attackers access raw kernel objects, exploit requires BPF program with specific load-acquire instructions.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90312)

## Details

Type

Type Confusion

Impact

Privilege Escalation, Information Disclosure

CVSS vector

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

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for BPF load-acquire source pointer validation.

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-2026-90312](https://nvd.nist.gov/vuln/detail/CVE-2026-90312)
- [https://git.kernel.org/stable/c/422a416041172af1ac610736d5f556d22b31b115](https://git.kernel.org/stable/c/422a416041172af1ac610736d5f556d22b31b115)
- [https://git.kernel.org/stable/c/6ee7b00888498cf387dd30729e18a05328b94709](https://git.kernel.org/stable/c/6ee7b00888498cf387dd30729e18a05328b94709)
- [https://git.kernel.org/stable/c/b87803391baa7e0bef60549d8841f12e549ad057](https://git.kernel.org/stable/c/b87803391baa7e0bef60549d8841f12e549ad057)

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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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