CVE-2025-62525 OpenWrt vulnerable to local privilage escalation

High 7.9 Published 22 Oct 2025 Updated 22 Oct 2025

Local attackers can escalate privileges and escape sandboxes by reading/writing kernel memory via the ltq-ptm driver on specific Lantiq targets.

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-2025-62525?

CVE-2025-62525 is a high-severity vulnerability in Openwrt Openwrt, published on 22 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

OpenWrt Project is a Linux operating system targeting embedded devices. Prior to version 24.10.4, local users could read and write arbitrary kernel memory using the ioctls of the ltq-ptm driver which is used to drive the datapath of the DSL line. This only effects the lantiq target supporting xrx200, danube and amazon SoCs from Lantiq/Intel/MaxLinear with the DSL in PTM mode. The DSL driver for the VRX518 is not affected. ATM mode is also not affected. Most VDSL lines use PTM mode and most ADSL lines use ATM mode. OpenWrt is normally running as a single user system, but some services are sandboxed. This vulnerability could allow attackers to escape a ujail sandbox or other contains. This is fixed in OpenWrt 24.10.4. There are no workarounds.

Weakness: CWE-787, CWE-20, CWE-125

Which versions are affected by CVE-2025-62525?

It affects 1 product.

Products include Openwrt Openwrt.

How do I fix CVE-2025-62525?

Upgrade to a fixed version.

Is CVE-2025-62525 being exploited?

There is no known exploitation of CVE-2025-62525 in the wild and no public exploit code.

All Openwrt Openwrt vulnerabilities

Sources

Also known as GHSA-h427-frpr-7cqr, ROOT-OS-UBUNTU-2204-CVE-2025-62525.