CVE-2025-71086 Linux CVE debrief

Who should care

Linux kernel developers, Linux distribution maintainers, and users of Linux-based systems, especially those with Linux kernel deployments, should be aware of this vulnerability and review patch guidance.

Technical summary

The rose_kill_by_device() function in the Linux kernel collects sockets into a local array and then iterates over them to disconnect sockets bound to a device being brought down. However, the loop mistakenly indexes array[cnt] instead of array[i], leading to an out-of-bounds read or an uninitialized entry read. This can cause an invalid socket pointer dereference and leak references taken via sock_hold(). Defenders should focus on patching this vulnerability.

Defensive priority

High priority should be given to patching this vulnerability, as it can be used to cause a denial of service or potentially execute arbitrary code.

Recommended defensive actions

• Apply the official patches provided by the Linux kernel maintainers.
• Review and update Linux kernel versions to ensure they are not vulnerable.
• Monitor system logs for potential exploitation attempts.
• 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 was published on 2026-01-13T16:16:08.230Z and was last modified on 2026-07-14T13:18:02.280Z. The NVD entry is currently Modified. Evidence is limited to CVE and NVD details. Defenders should verify Linux kernel versions and patch status.

Official resources