Bug 2373334 (CVE-2025-38054)

Summary: CVE-2025-38054 kernel: ptp: ocp: Limit signal/freq counts in summary output functions
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-06-18 10:02:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ptp: ocp: Limit signal/freq counts in summary output functions

The debugfs summary output could access uninitialized elements in
the freq_in[] and signal_out[] arrays, causing NULL pointer
dereferences and triggering a kernel Oops (page_fault_oops).
This patch adds u8 fields (nr_freq_in, nr_signal_out) to track the
number of initialized elements, with a maximum of 4 per array.
The summary output functions are updated to respect these limits,
preventing out-of-bounds access and ensuring safe array handling.

Widen the label variables because the change confuses GCC about
max length of the strings.
Comment 1 Avinash Hanwate 2025-06-21 03:41:02 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025061832-CVE-2025-38054-4ba3@gregkh/T