CVE-2026-56946

Published Nov 10, 2026 CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
Description
In smmu_unmap_visit_leaf of arm-smmu-v3.c, there is a possible way to release active direct memory access page references during unmapping due to a logic error. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
Weaknesses CWE-693
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Title Unmap Logic Error in ARM SMMU Enables Local Privilege Escalation
Weaknesses CWE-284
CWE-416
Type Values Removed Values Added
Title Unmap Logic Error in ARM SMMU Enables Local Privilege Escalation
Weaknesses CWE-284
CWE-416
Type Values Removed Values Added
Description In smmu_unmap_visit_leaf of arm-smmu-v3.c, there is a possible way to release active direct memory access page references during unmapping due to a logic error. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
References

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Weaknesses

Sources

Status
PUBLISHED
Assigner
Google_Devices
Published
Updated
Nov 13, 2026, 2:01 PM
Reserved
Jun 23, 2026, 4:13 PM
Status
Awaiting Analysis
Published
Nov 10, 2026, 8:19 PM
Modified
Nov 13, 2026, 2:17 PM