iommu/msm: Unwind probe state on registration failure (CVE-2026-89452) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89452

iommu/msm: Unwind probe state on registration failure

Answer in brief

CVE-2026-89452 records a Unknown severity vulnerability in iommu/msm: Unwind probe state on registration failure. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=42df43b36163ed7d0ab13992e411093252903273 <f532401be9312ecd166f616bb74a65b0b4c150fa \|\| >=42df43b36163ed7d0ab13992e411093252903273 <7f7074a886c4a93e3d12076ce60a510a1ebe400c \|\| >=42df43b36163ed7d0ab13992e411093252903273 <535a200220ca2c83bc8bf54bd2cbe045d6ee70c4	f532401be9312ecd166f616bb74a65b0b4c150fa, 7f7074a886c4a93e3d12076ce60a510a1ebe400c, 535a200220ca2c83bc8bf54bd2cbe045d6ee70c4
Linux/Linuxgeneric	4.11	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to f532401be9312ecd166f616bb74a65b0b4c150fa if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: iommu/msm: Unwind probe state on registration failure msm_iommu_probe() adds its devm-managed IOMMU object to qcom_iommu_devices before adding the IOMMU sysfs device and registering it with the IOMMU core. If iommu_device_sysfs_add() fails, probe returns with the object still on qcom_iommu_devices. The driver core then releases the devm allocation, leaving a dangling list entry that later list walks may dereference. If iommu_device_register() fails, the same dangling list entry remains and the sysfs device is left registered as well. Unwind the sysfs device and global list entry in reverse setup order on the corresponding failure paths.

Quoted source text, attributed separately from HOL analysis.