Vulnerability Details CVE-2026-49416
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 1.4%
CVSS Severity
CVSS v3 Score 7.8