CVE-2025-38719 net: hibmcge: fix the division by zero issue

What is CVE-2025-38719?

CVE-2025-38719 is a medium-severity denial of service vulnerability in Linux kernel, published on 4 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-369

Which versions are affected by CVE-2025-38719?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-38719?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-38719 being exploited?

There is no known exploitation of CVE-2025-38719 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2025-38719, GHSA-r534-vwmw-5gmq, UBUNTU-CVE-2025-38719.