# CVE-2026-80954

## Summary

- **CVE ID:** CVE-2026-80954
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 13, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:

i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode()

i3c_device_get_supported_xfer_mode() uses dev->desc to obtain the
master controller.  However, dev->desc must not be dereferenced unless
bus->lock is held, and this function does not take that lock.

The function only needs access to the master controller associated with
the device's bus.  Use dev->bus instead, which is always valid for the
lifetime of the device and does not require dereferencing dev->desc.

## Affected Products

- Linux — Linux (256a21743d911f94ce92fe28f793cd586f3860b2)
- Linux — Linux (6.19)
- Linux — Linux (0)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)

## References

- [CNA](https://git.kernel.org/stable/c/251db58324ea4792c3f9f692ab09be148e051969)
- [CNA](https://git.kernel.org/stable/c/8bed7f4fa710914b7f05fd59998316bfb4d43385)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.15%
- **EPSS Percentile:** 4.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._