CVE-2025-38533
A critical flaw in the Linux kernel’s network driver can cause undefined behavior, including memory corruption or crashes, when handling incoming packets. The bug stems from an uninitialized DMA address that may be used during packet reception. The issue has been fixed in recent kernel releases.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Linux kernel, particularly versions 6.16 and earlier that contain the libwx network driver. Typical users include system administrators and anyone running a Linux system with that kernel.
Real-world impact
An attacker could potentially cause a system crash or memory corruption, leading to denial of service or possibly executing arbitrary code if the flaw is exploited in a privileged context. However, the vulnerability requires network access and no user interaction.
Why this severity
The CVSS score of 9.8 reflects the high impact on confidentiality, integrity, and availability, combined with the fact that the flaw can be triggered remotely over the network without any special privileges or user interaction.
What to do about it
- 011. Update your Linux kernel to a version that includes the fix (e.g., 6.16 or later).
- 022. Reboot the system to load the new kernel.
NVD description indicates the vulnerability has been resolved in the Linux kernel
Timeline
- Aug 16, 2025 · Aug 16, 2025PublishedDisclosed and added to the National Vulnerability Database.
- Jul 30, 2026 · 7d agoAdvisory updatedThe NVD record was last revised.
- Jul 30, 2026 · 6d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.