# CVE-2026-80954: linux: In the Linux kernel, the following vulnerability has been resolved:  i3c: Fix unlocked dereference of dev->desc in i3...

CVE-2026-80954 is fixed in linux on 1 platform by DEBIAN-CVE-2026-80954 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-80954
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 11, 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-80954](https://patchblox.com/security/data/fix/linux/debian-cve-2026-80954.md) | Sep 23, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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