irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing (CVE-2026-90120) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90120

irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing

Answer in brief

CVE-2026-90120 records a Unknown severity vulnerability in irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing. 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	>=35866efa52feaf48cc54a0745851a555654e1446 <6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69 \|\| >=35866efa52feaf48cc54a0745851a555654e1446 <328affc639ce9873a7a0a3fd6b8339f19767529b	6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69, 328affc639ce9873a7a0a3fd6b8339f19767529b
Linux/Linuxgeneric	7.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69 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: irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing In gic_acpi_parse_iaffid() a given MADT GICC entry might not correspond to a logical cpu recognized by the kernel, resulting in the cpu variable initialization to an error value. Currently, the get_logical_index() return value is not checked for failure, which might result in out-of-bounds memory corruption while trying to index a per_cpu variable array. Add a check to evaluate get_logical_index() return value.

Quoted source text, attributed separately from HOL analysis.