iommu/tegra241-cmdqv: Don't fall back to a freed smmu after devm_krealloc() (CVE-2026-90427) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90427

iommu/tegra241-cmdqv: Don't fall back to a freed smmu after devm_krealloc()

Answer in brief

CVE-2026-90427 records a Unknown severity vulnerability in iommu/tegra241-cmdqv: Don't fall back to a freed smmu after devm_krealloc(). 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 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 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	>=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <86197679b293f0601c3331d545f99a70a7780aa9 \|\| >=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <d4d05f55e9da646ec03adfa77260eb46f4163749	86197679b293f0601c3331d545f99a70a7780aa9, d4d05f55e9da646ec03adfa77260eb46f4163749
Linux/Linuxgeneric	6.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 86197679b293f0601c3331d545f99a70a7780aa9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: iommu/tegra241-cmdqv: Don't fall back to a freed smmu after devm_krealloc() __tegra241_cmdqv_probe() uses devm_krealloc() to grow @smmu into the larger tegra241_cmdqv, which frees the original @smmu once it relocates. A failure after that returned NULL, and the caller then dereferenced the freed @smmu on its fallback path. Return an int and take @smmu by reference instead, then update *smmu to the reallocated pointer after devm_krealloc() succeeds, so the caller and its fallback path both use the live @smmu rather than the freed original.

Quoted source text, attributed separately from HOL analysis.