CVE-2026-72483
CVE CVE-2026-72483EUVD EUVD-2026-59382Published 2026-08-15T05:57:20.000ZLast changed 2026-08-17T05:44:46.000ZCVSS 7.8
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 2d53139f31626bad6f8983d8e519ddde2cbba921 <cff06b03b530ae1fe8a13e93a7848f2130e00fb4; 2d53139f31626bad6f8983d8e519ddde2cbba921 <00dd025324b56d39d37e57a08f473dab3a660f30; 2d53139f31626bad6f8983d8e519ddde2cbba921 <4da073d57176d8e1c2bca34febfbc81d2560c1a5; 2d53139f31626bad6f8983d8e519ddde2cbba921 <3be5f24e8270ba53b3c814d13689bb8644c86237; patch: 5.15.212; patch: 5.10.261; 2d53139f31626bad6f8983d8e519ddde2cbba921 <08b1d4cab0230697bc74c63fc4e40170a7559c54; 2d53139f31626bad6f8983d8e519ddde2cbba921 <02d03c61e8a7b016956acb48e8a2512d16d87517; 2d53139f31626bad6f8983d8e519ddde2cbba921 <e5fa9d8f40746ec3447335c9642c03410f5fd3af; patch: 6.6.145; patch: 0; patch: 7.2; 2d53139f31626bad6f8983d8e519ddde2cbba921 <d512bdefd241b98f4d7bcb5bab5614a86411fad4; 3.16; patch: 6.1.178; patch: 6.18.40; patch: 6.12.97; patch: 7.1.5
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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