CVE-2025-71086 net: rose: fix invalid array index in rose_kill_by_device()
An invalid array index in the Linux kernel's ROSE network module can cause a null pointer dereference and reference leak, leading to a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-71086?
CVE-2025-71086 is a high-severity vulnerability in Linux kernel, published on 13 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: rose: fix invalid array index in rose_kill_by_device()
rose_kill_by_device() collects sockets into a local array[] and then iterates over them to disconnect sockets bound to a device being brought down.
The loop mistakenly indexes array[cnt] instead of array[i]. For cnt < ARRAY_SIZE(array), this reads an uninitialized entry; for cnt == ARRAY_SIZE(array), it is an out-of-bounds read. Either case can lead to an invalid socket pointer dereference and also leaks references taken via sock_hold().
Fix the index to use i.
Weakness: CWE-129
Which versions are affected by CVE-2025-71086?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-71086?
Apply the vendor's patch.
Is CVE-2025-71086 being exploited?
There is no known exploitation of CVE-2025-71086 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-71086, DEBIAN-CVE-2025-71086, GHSA-mqvv-vjpm-cprh, ROOT-OS-DEBIAN-11-CVE-2025-71086, ROOT-OS-DEBIAN-12-CVE-2025-71086, ROOT-OS-DEBIAN-13-CVE-2025-71086 and 3 more.