CVE-2026-49416 — Integer overflow in vt(4) CONS_HISTORY ioctl
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 h…
Published: 2026-06-27 · CVSS: 7.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7