NULL Pointer Dereference in Linux HID pidff Component

Publication date: 2026-03-25

Last updated on: 2026-04-24

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: HID: pidff: Fix condition effect bit clearing As reported by MPDarkGuy on discord, NULL pointer dereferences were happening because not all the conditional effects bits were cleared. Properly clear all conditional effect bits from ffbit

CVSS Scores

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Meta Information

Published

2026-03-25

Last Modified

2026-04-24

Generated

2026-07-06

AI Q&A

2026-03-25

EPSS Evaluated

2026-07-05

NVD

CVE-2026-23349

EUVD

EUVD-2026-15319

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	6.18
linux	linux_kernel	From 6.18.1 (inc) to 6.18.17 (exc)
linux	linux_kernel	From 6.19 (inc) to 6.19.7 (exc)
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-476	The product dereferences a pointer that it expects to be valid but is NULL.

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel's HID subsystem, specifically in the pidff driver. The issue was that not all conditional effect bits were properly cleared, which caused NULL pointer dereferences. The fix involved ensuring that all conditional effect bits are correctly cleared to prevent these dereferences.

Impact Analysis

The vulnerability can lead to NULL pointer dereferences in the Linux kernel, which may cause system crashes or instability. This could potentially be exploited to disrupt normal system operations or cause denial of service.

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