CVE-2026-49416
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.
Metadata
Severity & Metrics
No CVSS data available.
Affected products (1)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| FreeBSD | FreeBSD | — | 15.0-RELEASE < p10, 14.4-RELEASE < p6, 14.3-RELEASE < p15 |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-190 | cna | CWE-190: Integer Overflow or Wraparound |