CVE-2026-49416

high

Description

A design error vulnerability has been identified in FreeBSD. This issue occurs due to improper validation of the requested history size in the CONS_HISTORY ioctl handler. A large input value can cause an integer overflow during buffer size calculation, leading to a heap allocation smaller than required and resulting in out-of-bounds write during buffer initialization.

Details

Source: Mitre, NVD

Published: 2026-06-11

Risk Information

CVSS v2

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High