# CVE-2026-49416 — FreeBSD

> As of 2026-06-27, CVE-2026-49416 is a vulnerability in FreeBSD, EPSS 0.1% (4.2th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-49416 as of 2026-06-27; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-06-27

## What is 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.

The record classifies CVE-2026-49416 under weakness class [CWE-190](https://intel.threadlinqs.com/cwe/CWE-190). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 100 days ago.

## Severity and exploitation probability

- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 4.2% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 0.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-06-27

## Is CVE-2026-49416 being exploited?

It currently carries a trending score of 31 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [FreeBSD](https://intel.threadlinqs.com/vendors/freebsd): FreeBSD

## How to fix CVE-2026-49416

No vendor patch reference has been recorded for CVE-2026-49416 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-49416

No threat campaign in the Threadlinqs corpus currently references CVE-2026-49416, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-06-29. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [security.freebsd.org — vendor advisory](https://security.freebsd.org/advisories/FreeBSD-SA-26:34.vt.asc)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-49416
Full detection coverage and IOCs for threats exploiting CVE-2026-49416 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp