Use of Uninitialized Variable in FreeBSD - CVE-2026-49425
Published: July 1, 2026
Vulnerability identifier: #VU136019
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-49425
CWE-ID: CWE-457
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 disclose sensitive information.
The vulnerability exists due to uninitialized stack memory in the compat32 kevent() handler when translating a 64-bit kevent structure into a 32-bit structure. A local user can invoke the affected system call to disclose sensitive information.
The issue affects 32-bit compatibility support for executing 32-bit binaries on 64-bit platforms.
How to mitigate CVE-2026-49425
Install security update from vendor's website.