CVE-2025-62525: OpenWrt vulnerable to local privilage escalation
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.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2025-62525?
CVE-2025-62525 is classified as a critical vulnerability due to the potential for local users to read and write arbitrary kernel memory.
How do I fix CVE-2025-62525?
To fix CVE-2025-62525, upgrade to OpenWrt version 24.10.4 or later.
Who is affected by CVE-2025-62525?
CVE-2025-62525 affects local users of OpenWrt versions prior to 24.10.4 on lantiq targets.
What systems are vulnerable to CVE-2025-62525?
Systems running OpenWrt prior to version 24.10.4 that utilize the ltq-ptm driver are vulnerable to CVE-2025-62525.
Can CVE-2025-62525 be exploited remotely?
CVE-2025-62525 cannot be exploited remotely as it requires local access to the vulnerable system.