---
id: "CVE-2026-58811"
page: "https://infrastack.ai/live/CVE-2026-58811"
kind: "vulnerability"
aliases: ["CVE-2026-58811"]
title: "Linux SMMU driver: wrong memory attributes can leak local information"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["arm", "infrastructure", "kernel", "linux", "smmu"]
not_affected_if: []
published_at: "2026-11-10T20:19:28+00:00"
first_seen_at: "2026-11-10T20:46:12+00:00"
updated_at: "2026-11-10T20:50:10+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58811", "first_seen_at": "2026-11-10T20:46:12+00:00"}]
exploit_sources: []
---

# Linux SMMU driver: wrong memory attributes can leak local information

Link for people: https://infrastack.ai/live/CVE-2026-58811 (this .md is for agents)

A logic error in the smmu.c driver function smmu_get_mair_idx applies incorrect memory attributes to direct memory access mappings. A local process could use this to read information it should not see, with no extra privileges and no user interaction.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-10T20:46:12+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-58811

## From the sources

In smmu_get_mair_idx of smmu.c, there is a possible way to apply incorrect memory attributes to direct memory access mappings due to a logic error. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_