CVE-2026-49416
Integer overflow in vt(4) CONS_HISTORY ioctl
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Lifecycle
27 Jun 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
Affected products
FreeBSD · FreeBSDWant to know if your infrastructure is exposed to this?
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