VULNERABILITY INTELLIGENCE

CVE-2026-49416

CVSS score7.8 HIGH
EPSS probability0.15%
CISA KEVNot currently listed
Published2026-06-27
Last modified2026-07-01
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

The CONS_HISTORY ioctl handler did not adequately validate the requested history size. A large value caused an integer overflow in the buffer size calculation, resulting in a heap allocation smaller than expected. Subsequent initialization of the buffer wrote beyond the end of the allocation. An unprivileged local user with access to a vt(4) device can trigger an out-of-bounds write in the kernel, potentially escalating privileges.

Weakness classification

  • secteam@freebsd.org: CWE-190

Primary references