CVE-2026-46298

Analyzed Analyzed - Analysis Complete

pseries/papr-hvpipe Race Condition Fix in Linux Kernel

Publication date: 2026-06-08

Last updated on: 2026-07-08

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: pseries/papr-hvpipe: Fix race with interrupt handler While executing ->ioctl handler or ->release handler, if an interrupt fires on the same cpu, then we can enter into a deadlock. This patch fixes both these handlers to take spin_lock_irq{save|restore} versions of the lock to prevent this deadlock.

CVSS Scores

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Meta Information

Published

2026-06-08

Last Modified

2026-07-08

Generated

2026-07-19

AI Q&A

2026-06-08

EPSS Evaluated

2026-07-18

NVD

CVE-2026-46298

EUVD

EUVD-2026-35164

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	From 6.18 (inc) to 7.0.7 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-362	The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel specifically in the pseries/papr-hvpipe component. It involves a race condition between the interrupt handler and the ioctl or release handlers. If an interrupt fires on the same CPU while either the ioctl or release handler is executing, it can cause a deadlock.

The issue is fixed by modifying these handlers to use spin_lock_irqsave and spin_lock_irqrestore versions of the lock, which prevent the deadlock by properly managing interrupt states during locking.

Impact Analysis

This vulnerability can cause the system to enter a deadlock state when an interrupt occurs simultaneously with certain handler executions. This deadlock can lead to system hangs or crashes, potentially affecting system stability and availability.

Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version that includes the patch fixing the race condition in the pseries/papr-hvpipe ioctl and release handlers.

This patch ensures that spin_lock_irq{save|restore} versions of the lock are used to prevent deadlocks caused by interrupts firing on the same CPU during these handlers.

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