Use-After-Free in Linux Kernel KVM IOMMU

Publication date: 2026-09-08

Last updated on: 2026-09-24

Assigner: Android (associated with Google Inc. or Open Handset Alliance)

Description

In kvm_iommu_map_sg of iommu.c, there is a possible use after free due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-24

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-58846

Affected Vendors & Products

Vendor	Product	Version / Range
google	android	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-269	The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Attack-Flow Graph

Executive Summary

This vulnerability is a use-after-free issue in the kvm_iommu_map_sg function of iommu.c. It occurs due to a missing permission check, allowing an attacker to exploit a freed memory location. This can lead to local privilege escalation without needing additional execution privileges or user interaction.

Impact Analysis

An attacker could exploit this to gain elevated privileges on your system, potentially allowing them to execute arbitrary code, install malware, or steal sensitive data. Since no user interaction is required, the risk is higher as attacks can happen silently in the background.

Mitigation Strategies

Apply the latest security patches from your Android or Linux kernel vendor immediately. Monitor vendor advisories for updates related to CVE-2026-58846. Disable unnecessary IOMMU features if patches are not immediately available.

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