Bug 2532524 (CVE-2026-80954) - CVE-2026-80954 kernel: i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode()
Summary: CVE-2026-80954 kernel: i3c: Fix unlocked dereference of dev->desc in i3c_devi...
Keywords:
Status: NEW
Alias: CVE-2026-80954
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-11 23:40 UTC by OSIDB Bzimport
Modified: 2026-09-14 16:22 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-09-11 23:40:19 UTC
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.


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