CVE-2025-62526
Prior to version 24.10.4, ubusd contains a heap buffer overflow in the event registration parsing code.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-122
- Affected
- openwrt/openwrt
- Source
- security-advisories@github.com
References
- https://github.com/openwrt/openwrt/commit/4b907e69ea58fc0ba35fd1755dc4ba22262af3a4Patch
- https://github.com/openwrt/openwrt/commit/a7901969932a175cded3c93bdeb65f32ed3705e6Patch
- https://github.com/openwrt/openwrt/security/advisories/GHSA-cp32-65v4-cp73Patch, Vendor Advisory
- https://github.com/openwrt/ubus/commit/60e04048a0e2f3e33651c19e62861b41be4c290fPatch
- https://github.com/openwrt/ubus/commit/aa4a7ee1d3417bc11207ad0a78d579ece7fe0c13Patch
- https://github.com/openwrt/ubus/commit/d31effb4277bd557f5ccf16d909422718c1e49d0Patch
- https://openwrt.org/advisory/2025-10-22-1Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.