CVE-2025-71094 Linux CVE debrief

Who should care

Linux kernel maintainers, users, and administrators should be aware of this vulnerability and take steps to validate PHY addresses and apply patches. Defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. The vulnerability affects Linux kernel deployments that use the ASIX driver. Security teams should monitor Linux kernel updates for further information on this vulnerability.

Why it matters

A vulnerability in the Linux kernel's ASIX driver can cause warnings when invalid PHY addresses are returned from USB devices. Defenders should validate PHY addresses and apply patches to resolve the issue.

• Defenders should validate PHY addresses to prevent warnings in the Linux kernel's ASIX driver.
• Linux kernel maintainers should apply patches to resolve the issue.
• Users and administrators should monitor Linux kernel updates for further information on this vulnerability.

Technical summary

The Linux kernel's ASIX driver did not validate PHY addresses returned from USB devices, causing warnings. This has been fixed by adding validation in the asix_read_phy_addr() function. The vulnerability affects Linux kernel deployments that use the ASIX driver. Defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. The issue has a CVSS score of 5.5 and a severity of MEDIUM. The vulnerability was published on 2026-01-13T16:16:09.150Z and has not been modified since then.

Defensive priority

Medium priority for Linux kernel maintainers and users, as it requires validation of PHY addresses to prevent warnings.

Recommended defensive actions

• Validate PHY addresses in the asix_read_phy_addr() function to prevent warnings.
• Apply patches from Linux kernel maintainers to resolve the issue.
• Monitor Linux kernel updates for further information on this vulnerability.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. The vulnerability has been resolved in the Linux kernel. Defenders should verify the affected scope and apply patches. The evidence is limited to publicly available information from the CVE Program and NVD. Further verification is required to confirm affected deployments.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.