Answer in brief
CVE-2026-72483 records a High severity (CVSS 7.8) vulnerability in usb: host: max3421: Fix shift-out-of-bounds in max3421_hub_control(). 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 7.8. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=2d53139f31626bad6f8983d8e519ddde2cbba921 <e5fa9d8f40746ec3447335c9642c03410f5fd3af || >=2d53139f31626bad6f8983d8e519ddde2cbba921 <08b1d4cab0230697bc74c63fc4e40170a7559c54 || >=2d53139f31626bad6f8983d8e519ddde2cbba921 <3be5f24e8270ba53b3c814d13689bb8644c86237 || >=2d53139f31626bad6f8983d8e519ddde2cbba921 <d512bdefd241b98f4d7bcb5bab5614a86411fad4 || >=2d53139f31626bad6f8983d8e519ddde2cbba921 <00dd025324b56d39d37e57a08f473dab3a660f30 || >=2d53139f31626bad6f8983d8e519ddde2cbba921 <02d03c61e8a7b016956acb48e8a2512d16d87517 || >=2d53139f31626bad6f8983d8e519ddde2cbba921 <4da073d57176d8e1c2bca34febfbc81d2560c1a5 || >=2d53139f31626bad6f8983d8e519ddde2cbba921 <cff06b03b530ae1fe8a13e93a7848f2130e00fb4 | e5fa9d8f40746ec3447335c9642c03410f5fd3af, 08b1d4cab0230697bc74c63fc4e40170a7559c54, 3be5f24e8270ba53b3c814d13689bb8644c86237, d512bdefd241b98f4d7bcb5bab5614a86411fad4, 00dd025324b56d39d37e57a08f473dab3a660f30, 02d03c61e8a7b016956acb48e8a2512d16d87517, 4da073d57176d8e1c2bca34febfbc81d2560c1a5, cff06b03b530ae1fe8a13e93a7848f2130e00fb4 |
| Linux/Linuxgeneric | 3.16 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: usb: host: max3421: Fix shift-out-of-bounds in max3421_hub_control() The `max3421_hub_control()` function handles USB hub class requests to the virtual root hub. In the `default` branches of both the `ClearPortFeature` and `SetPortFeature` switch statements, it modifies `max3421_hcd->port_status` by left shifting 1 by the request's `value` parameter. However, it does not validate whether this shift will exceed the width of `port_status`. So if a malicious userspace task with access to the root hub via /dev/bus/usb/.../001 issues a USBDEVFS_CONTROL ioctl with `wValue` greater than or equal to 32, the left shift operation invokes shift-out-of-bounds undefined behavior. This results in arbitrary bit corruption of `port_status`, including the normally-immutable change bits, which can bypass internal state checks and confuse the hub status. Fix this by rejecting requests whose `value` exceeds the shift width before performing the shift. This issue was found using a KLEE-based symbolic execution tool for kernel drivers that I'm currently developing.
Quoted source text, attributed separately from HOL analysis.