Bug 2393200 (CVE-2025-38719)

Summary: CVE-2025-38719 kernel: net: hibmcge: fix the division by zero issue
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-09-04 16:04:40 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: hibmcge: fix the division by zero issue

When the network port is down, the queue is released, and ring->len is 0.
In debugfs, hbg_get_queue_used_num() will be called,
which may lead to a division by zero issue.

This patch adds a check, if ring->len is 0,
hbg_get_queue_used_num() directly returns 0.
Comment 1 Jon Moroney 2025-09-04 17:23:57 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025090459-CVE-2025-38719-16b4@gregkh/T