CVE-2026-45896

Analyzed Analyzed - Analysis Complete

Array Index Out of Bounds in Linux Kernel MTD Intel-DG Driver

Publication date: 2026-05-27

Last updated on: 2026-06-25

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: mtd: intel-dg: Fix accessing regions before setting nregions The regions array is counted by nregions, but it's set only after accessing it: [] UBSAN: array-index-out-of-bounds in drivers/mtd/devices/mtd_intel_dg.c:750:15 [] index 0 is out of range for type '<unknown> [*]' Fix it by also fixing an undesired behavior: the loop silently ignores ENOMEM and continues setting the other entries.

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Meta Information

Published

2026-05-27

Last Modified

2026-06-25

Generated

2026-07-27

AI Q&A

2026-05-27

EPSS Evaluated

2026-07-25

NVD

CVE-2026-45896

EUVD

EUVD-2026-32362

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 6.19 (inc) to 6.19.4 (exc)
linux	linux_kernel	From 6.17 (inc) to 6.18.14 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-129	The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel's mtd: intel-dg driver. The issue arises because the regions array is accessed before the variable nregions, which counts the number of regions, is set. This leads to an out-of-bounds array access, as indicated by the UBSAN warning about an array-index-out-of-bounds error at a specific line in the source code.

Additionally, the code had an undesired behavior where a loop would silently ignore ENOMEM (out of memory) errors and continue setting other entries, which has also been fixed.

Impact Analysis

This vulnerability in the Linux kernel's mtd: intel-dg driver involves accessing regions before the number of regions (nregions) is set, leading to an out-of-bounds array access. This can cause undefined behavior such as memory corruption or system instability.

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