AMDGPU VCN4 Out-of-Bounds Read in IB Parsing

Publication date: 2026-05-28

Last updated on: 2026-06-10

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn4: Prevent OOB reads when parsing IB Rewrite the IB parsing to use amdgpu_ib_get_value() which handles the bounds checks.

CVSS Scores

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Meta Information

Published

2026-05-28

Last Modified

2026-06-10

Generated

2026-07-08

AI Q&A

2026-05-28

EPSS Evaluated

2026-07-06

NVD

CVE-2026-46204

EUVD

EUVD-2026-32831

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 6.13 (inc) to 6.18.32 (exc)
linux	linux_kernel	From 6.7 (inc) to 6.12.90 (exc)
linux	linux_kernel	From 6.19 (inc) to 7.0.9 (exc)
linux	linux_kernel	From 6.0 (inc) to 6.6.140 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel within the drm/amdgpu/vcn4 component. It involves out-of-bounds (OOB) reads when parsing the IB (Indirect Buffer). The issue was resolved by rewriting the IB parsing code to use the function amdgpu_ib_get_value(), which properly handles bounds checking to prevent these OOB reads.

Impact Analysis

Out-of-bounds reads can lead to unintended information disclosure or system instability. In this case, the vulnerability could allow an attacker to read memory outside the intended buffer, potentially exposing sensitive data or causing crashes in the Linux kernel's AMD GPU driver.

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