Bug 2451245 (CVE-2026-23349)

Summary: CVE-2026-23349 kernel: HID: pidff: Fix condition effect bit clearing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in the Linux kernel's Human Interface Device (HID) subsystem, specifically within the `pidff` module. This vulnerability occurs because not all conditional effect bits were properly cleared, leading to null pointer dereferences. A local attacker could potentially exploit this flaw to cause a system crash, resulting in a denial of service.
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Description OSIDB Bzimport 2026-03-25 11:06:46 UTC 
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
Comment 1 Alexander B 2026-03-25 13:39:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026032536-CVE-2026-23349-aa6a@gregkh/T