CVE-2026-58747

Received Received - Intake

Possible Privilege Escalation in Arm SMMU v3 Driver

Publication date: 2026-09-15

Last updated on: 2026-09-18

Assigner: Google Devices

Description

In smmu_detach_dev of arm-smmu-v3.c, there is a possible permission bypass due to a logic error in the code. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-15

Last Modified

2026-09-18

Generated

2026-10-06

AI Q&A

2026-09-16

EPSS Evaluated

2026-10-04

NVD

CVE-2026-58747

EUVD

EUVD-2026-79016

Affected Vendors & Products

Vendor	Product	Version / Range
google	android	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-693	The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

Attack-Flow Graph

Executive Summary

This vulnerability is a logic error in the smmu_detach_dev function of arm-smmu-v3.c that allows a permission bypass. It requires System execution privileges and could lead to local privilege escalation. No user interaction is needed to exploit it.

Detection Guidance

This vulnerability is specific to the arm-smmu-v3.c driver and requires system-level access to exploit. Detection may involve checking for unusual privilege escalation patterns or examining the SMMU (System Memory Management Unit) driver logs for errors related to device detachment. No direct commands are provided in the context, but monitoring kernel logs for SMMU-related errors or reviewing driver source code for logic flaws could help identify potential issues.

Impact Analysis

If exploited, this vulnerability could allow an attacker with System privileges to bypass permissions, potentially gaining unauthorized access to sensitive system resources or data.

Compliance Impact

This vulnerability allows local privilege escalation with system execution privileges, which could lead to unauthorized access or control over affected systems. Such access may violate compliance requirements under GDPR, HIPAA, or other standards that mandate strict access controls and data protection measures.

Mitigation Strategies

Apply patches or updates from the vendor for the arm-smmu-v3 component to fix the logic error in smmu_detach_dev. Monitor official security advisories for updates.

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