Bug 2532234 (CVE-2026-80950) - CVE-2026-80950 kernel: Linux kernel: Renesas I3C driver use-after-free leads to system crash
Summary: CVE-2026-80950 kernel: Linux kernel: Renesas I3C driver use-after-free leads ...
Keywords:
Status: NEW
Alias: CVE-2026-80950
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 21:34 UTC by OSIDB Bzimport
Modified: 2026-09-11 21:57 UTC (History)
15 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-11 21:34:50 UTC
In the Linux kernel, the following vulnerability has been resolved:

i3c: renesas: Check that the transfer is valid before accessing it

The Renesas I3C driver uses an asynchronous model to transfer data. It
prepares a struct renesas_i3c_xfer, enqueues it, and waits for completion.
The interrupt handler dequeues the transfer, updates/uses it, and signals
the waiting thread.

If the completion times out, the waiting thread dequeues the transfer and
free it. If an interrupt fires after that, the handler may access freed
memory, leading to crashes.

Check that the transfer is still valid before accessing it in the
interrupt handler. With it clear any status flags and disable all
the interrupts to avoid triggering the same interrupts again.


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