Answer in brief
CVE-2026-64227 records a Medium severity (CVSS 5.5) vulnerability in ACPI: driver: Check ACPI_COMPANION() against NULL during probe. 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.
CVSS is 5.5. 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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5829046825ac89fffc60f2670bc564fda2c0155a <a9451bf561232314755baf69a5916e0ac77f33fc || >=5829046825ac89fffc60f2670bc564fda2c0155a <34f4d0e4e5065237d15651df759a99e81b7f9f51 || >=5829046825ac89fffc60f2670bc564fda2c0155a <612ddab8fce04394bd7aebe8e0f2599642e30859 || >=5829046825ac89fffc60f2670bc564fda2c0155a <e4865a56d013e86e46ea6acea15bb6eae01898ff | a9451bf561232314755baf69a5916e0ac77f33fc, 34f4d0e4e5065237d15651df759a99e81b7f9f51, 612ddab8fce04394bd7aebe8e0f2599642e30859, e4865a56d013e86e46ea6acea15bb6eae01898ff |
| Linux/Linuxgeneric | 6.7 | Not reported |
Published upstream
Jul 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 13, 2026
In the Linux kernel, the following vulnerability has been resolved: ACPI: driver: Check ACPI_COMPANION() against NULL during probe Since every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), platform drivers that rely on the existence of a device's ACPI companion object should verify its presence. Accordingly, add requisite ACPI_COMPANION() or ACPI_HANDLE() checks against NULL to 13 platform drivers handling core ACPI devices. Also change the value returned by the ACPI thermal zone driver when the device's ACPI companion is not present to -ENODEV for consistency with the other drivers.
Quoted source text, attributed separately from HOL analysis.