CVE-2025-62526

OpenWrt ubusd vulnerable to heap buffer overflow

Published Oct 22, 2025 CVSS 3.1 · 7.9 High EPSS < 1% KEV · Not listed
Description
OpenWrt Project is a Linux operating system targeting embedded devices. Prior to version 24.10.4, ubusd contains a heap buffer overflow in the event registration parsing code. This allows an attacker to modify the head and potentially execute arbitrary code in the context of the ubus daemon. The affected code is executed before running the ACL checks, all ubus clients are able to send such messages. In addition to the heap corruption, the crafted subscription also results in a bypass of the listen ACL. This is fixed in OpenWrt 24.10.4. There are no workarounds.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Linux
Linux linux
Openwrt
Openwrt openwrt
Vendors & Products Linux
Linux linux
Openwrt
Openwrt openwrt
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description OpenWrt Project is a Linux operating system targeting embedded devices. Prior to version 24.10.4, ubusd contains a heap buffer overflow in the event registration parsing code. This allows an attacker to modify the head and potentially execute arbitrary code in the context of the ubus daemon. The affected code is executed before running the ACL checks, all ubus clients are able to send such messages. In addition to the heap corruption, the crafted subscription also results in a bypass of the listen ACL. This is fixed in OpenWrt 24.10.4. There are no workarounds.
Title OpenWrt ubusd vulnerable to heap buffer overflow
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 7.9, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 22, 2025, 3:55 PM
Reserved
Oct 15, 2025, 3:03 PM
Status
Analyzed
Published
Oct 22, 2025, 3:16 PM
Modified
Oct 19, 2026, 4:10 PM