CVE-2025-38429 bus: mhi: ep: Update read pointer only after buffer is written

What is CVE-2025-38429?

CVE-2025-38429 is a critical vulnerability in Linux kernel, published on 25 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

bus: mhi: ep: Update read pointer only after buffer is written

Inside mhi_ep_ring_add_element, the read pointer (rd_offset) is updated before the buffer is written, potentially causing race conditions where the host sees an updated read pointer before the buffer is actually written. Updating rd_offset prematurely can lead to the host accessing an uninitialized or incomplete element, resulting in data corruption.

Invoke the buffer write before updating rd_offset to ensure the element is fully written before signaling its availability.

Weakness: CWE-908

Which versions are affected by CVE-2025-38429?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-38429?

Apply the vendor's patch.

Is CVE-2025-38429 being exploited?

There is no known exploitation of CVE-2025-38429 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-2025-38429, DEBIAN-CVE-2025-38429, GHSA-f5fc-m65h-gr9j, ROOT-OS-DEBIAN-12-CVE-2025-38429, ROOT-OS-UBUNTU-2404-CVE-2025-38429, UBUNTU-CVE-2025-38429.