CVE-2026-43263

Analyzed Analyzed - Analysis Complete

Null Pointer Dereference in Linux Kernel Wave5 Decoder

Publication date: 2026-05-06

Last updated on: 2026-05-08

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: media: chips-media: wave5: Fix Null reference while testing fluster When multi instances are created/destroyed, many interrupts happens and structures for decoder are removed. "struct vpu_instance" this structure is shared for all flow in the decoder, so if the structure is not protected by lock, Null dereference could happens sometimes. IRQ Handler was spilt to two phases and Lock was added as well.

CVSS Scores

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Meta Information

Published

2026-05-06

Last Modified

2026-05-08

Generated

2026-07-06

AI Q&A

2026-05-06

EPSS Evaluated

2026-07-05

NVD

CVE-2026-43263

EUVD

EUVD-2026-27660

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 6.19 (inc) to 6.19.6 (exc)
linux	linux_kernel	From 6.8 (inc) to 6.18.16 (exc)

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 media chips-media wave5 driver. It involves a null reference error that can occur during the testing of the fluster component.

The issue arises when multiple instances are created and destroyed, causing many interrupts and removal of decoder structures. The "struct vpu_instance" is shared across all decoder flows, and if this structure is not properly protected by a lock, a null dereference can sometimes happen.

To fix this, the IRQ handler was split into two phases and a lock was added to protect the shared structure, preventing the null dereference.

Impact Analysis

This vulnerability can lead to a null pointer dereference in the Linux kernel's media driver, which may cause system instability or crashes when multiple decoder instances are created or destroyed.

Such crashes could potentially lead to denial of service conditions on affected systems, impacting availability.

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