SB2026022529 - Multiple vulnerabilities in FreeBSD

Description

This security bulletin contains information about 2 vulnerabilities.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2025-15576)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to nullfs(4) may allow interprocess communication between two jail processes via a unix domain socket. A local process can break the chroot and gain unauthorized access to files inside another jail process. 

2) Buffer overflow (CVE-ID: CVE-2026-3038)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when handling sockaddr structures within the rtsock_msg_buffer() function in route(4). A local user can trigger memory corruption and execute arbitrary code with root privileges. 

Remediation

Install update from vendor's website.

References

• https://www.freebsd.org/security/advisories/FreeBSD-SA-26:04.jail.asc
• https://www.freebsd.org/security/advisories/FreeBSD-SA-26:05.route.asc