Bug 2513208 (CVE-2026-68176) - CVE-2026-68176 kernel: Kernel: Null pointer dereference in mmiotrace can lead to denial of service
Summary: CVE-2026-68176 kernel: Kernel: Null pointer dereference in mmiotrace can lead...
Keywords:
Status: NEW
Alias: CVE-2026-68176
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-10 12:24 UTC by OSIDB Bzimport
Modified: 2026-08-12 12:17 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-10 12:24:58 UTC 
In the Linux kernel, the following vulnerability has been resolved:

tracing: Fix mmiotrace possible NULL dereferencing of hiter->dev

If the mmio_pipe_open() fails to find a PCI device, the hiter->dev
will be assigned to NULL. The mmiotrace read() function dereferences the
hiter->dev if hiter exists.

Change the test of the read to not only check hiter being NULL, but also
the hiter->dev before dereferencing it.
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