CVE-2026-72133

Received Received - Intake

Race Condition in Linux Kernel SPI UniPhier Driver

Publication date: 2026-08-15

Last updated on: 2026-08-17

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: spi: uniphier: Fix completion initialization order before devm_request_irq() The driver calls devm_request_irq() before initializing the completion used by the interrupt handler. Because the interrupt may occur immediately after devm_request_irq(), the handler may execute before init_completion(). This may result in calling complete() on an uninitialized completion, causing undefined behavior. This has been observed with KASAN. Fix this by initializing the completion before registering the IRQ.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-15

Last Modified

2026-08-17

Generated

2026-09-04

AI Q&A

2026-08-15

EPSS Evaluated

2026-09-03

NVD

CVE-2026-72133

EUVD

EUVD-2026-58891

Affected Vendors & Products

Vendor	Product	Version / Range
uniphier	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a Linux kernel vulnerability in the spi: uniphier driver where the completion mechanism is initialized after requesting an interrupt. This can cause the interrupt handler to run before the completion is set up, leading to undefined behavior when complete() is called on an uninitialized completion structure.

Detection Guidance

This vulnerability is specific to the Linux kernel's spi-uniphier driver and may not have direct network detection methods. Check kernel logs for errors related to spi-uniphier or completion initialization failures. Use commands like dmesg | grep spi or journalctl -k | grep spi to inspect kernel messages for unusual behavior.

Impact Analysis

This vulnerability may cause system instability or crashes due to undefined behavior in the kernel. It could lead to kernel panics, data corruption, or security issues if exploited maliciously. Systems using the uniphier SPI driver may experience unexpected failures.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards. It is a low-level Linux kernel driver issue that could cause undefined behavior due to improper initialization order, but it does not involve data exposure, privacy violations, or security controls relevant to these regulations.

Mitigation Strategies

Update the Linux kernel to a patched version where this issue is resolved. If using a custom kernel, apply the fix by initializing the completion before registering the IRQ in the spi-uniphier driver. Monitor system logs for any signs of the vulnerability being exploited.

Hi! I’m here to help you understand CVE-2026-72133. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70