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Vulnerability record · CVE-2025-62525 · published 22 October 2025

CVE-2025-62525: Openwrt improper input validation vulnerability

Openwrt · Openwrt

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.

8.8 CVSS 3.1 High EPSS 0.19% · top 92.3% CWE-20 · Improper input validationCWE-125 · Out-of-bounds read
8.8CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/openwrt/openwrt/commit/2a76abc5442e3f74d95b4caa9bb57e5488fc132e Patch
https://github.com/openwrt/openwrt/commit/e001b31163a77683ee741d169f794cfa50926f37 Patch
https://github.com/openwrt/openwrt/security/advisories/GHSA-h427-frpr-7cqr PatchVendor Advisory
https://openwrt.org/advisory/2025-10-22-2 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2025-62525), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.