The vulnerability of the ioctl request handler CONS_HISTORY in FreeBSD’s operating systems allows a attacker to increase their privileges and execute arbitrary code.

The vulnerability of the ioctl request handler CONSHISTORY in FreeBSD operating systems is related to integer overflow. Exploiting this vulnerability can allow an attacker to enhance their privileges and execute arbitrary code...

CVE-2026-49416

The CONSHISTORY 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...

CVE-2026-49416: Integer Overflow or Wraparound

The CONSHISTORY 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...

FreeBSD Security Advisory - FreeBSD-SA-26:34.vt

FreeBSD Security Advisory - The CONSHISTORY 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...