Heap-based buffer overflow in FreeBSD - CVE-2026-35547
Published: April 30, 2026
Vulnerability identifier: #VU128489
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-35547
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: FreeBSD Foundation
Affected software:
FreeBSD
FreeBSD
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges or cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow in libnv when processing the header of an incoming message. A local user can send a specially crafted message to escalate privileges or cause a denial of service.
How to mitigate CVE-2026-35547
Install security update from vendor's website.