Out-of-bounds Read in Openwrt
CVE-2025-62525
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.9 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Openwrt — versions < 24.10.4
Weakness classification (CWE)
References
- github.com/openwrt/openwrt/security/advisories/GHSA-h427-frpr-7cqr (Patch, Vendor Advisory)
- github.com/openwrt/openwrt/commit/2a76abc5442e3f74d95b4caa9bb57e5488fc132e (Patch)
- github.com/openwrt/openwrt/commit/e001b31163a77683ee741d169f794cfa50926f37 (Patch)
- openwrt.org/advisory/2025-10-22-2 (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-62525?
- CVE-2025-62525 is a high-severity vulnerability in Openwrt, classified under Improper Input Validation. CVSS score: 7.9/10. Published 2025-10-22.
- How severe is CVE-2025-62525?
- High severity. CVSS v3 base score is 7.9 out of 10.