CVE-2026-80689
In the Linux kernel, the following vulnerability has been resolved: tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions mmio_trace_rw() and mmio_trace_mapping() retrieve mmio_trace_array into tr and pass it to __trace_mmiotrace_rw() and __trace_mmiotrace_map(). If these functions are invoked while mmio_trace_array is NULL (e.g. before initialization or after disabled), accessing tr->array_buffer.buffer will result in a NULL pointer dereference crash. Fix this by adding an explicit NULL check for tr at the beginning of __trace_mmiotrace_rw() and __trace_mmiotrace_map().
Affected versions
Linux kernel versions
2.6.27
and later are affected. Fixed in
5.10.270,
5.15.221,
6.1.188,
6.6.157,
6.12.103,
6.18.44,
7.1.8,
7.2
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-80689?
CVE-2026-80689 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.27 onward and has been patched in 5.10.270, 5.15.221, 6.1.188 and others. CVE-2026-80689 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-80689?
Yes. CVE-2026-80689 has been patched. Fixed versions include 5.10.270, 5.15.221, 6.1.188 and others. If you are running Linux kernel 2.6.27 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-80689 actively exploited?
No. CVE-2026-80689 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.