---
cve: "CVE-2026-49416"
severity: "HIGH"
cvss: 7.8
epss: "11%"
vendor: "FreeBSD"
kev: false
exploited: false
published: "2026-06-27 10:16:38"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-09T12:26:04+02:00"
---

# CVE-2026-49416

> 7.8 HIGH

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

- <https://security.freebsd.org/advisories/FreeBSD-SA-26:34.vt.asc>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-49416) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_