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.

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.