# CVE-2026-49413 — FreeBSD

> As of 2026-06-27, CVE-2026-49413 is a vulnerability in FreeBSD, EPSS 0.1% (3.7th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-49413 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-2026-49413?

The Linuxulator determined whether a binary was set-user-ID or set-group-ID by checking the P_SUGID process flag. During execve(2), this flag is not yet set at the point where the auxiliary vector is constructed, so AT_SECURE was incorrectly set to zero for set-user-ID and set-group-ID executables. An unprivileged local user can inject a shared library via LD_PRELOAD into a set-user-ID or set-group-ID Linux binary, gaining the privileges of that binary.

The record classifies CVE-2026-49413 under weakness class [CWE-266](https://intel.threadlinqs.com/cwe/CWE-266). 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 3.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-06-27

## Is CVE-2026-49413 being exploited?

Weaponised exploit code for CVE-2026-49413 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 38 in the Threadlinqs vulnerability feed.

- [ii4gsp/CVE-2026-49413](https://github.com/ii4gsp/CVE-2026-49413) (github)

## Affected products and versions

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

## How to fix CVE-2026-49413

No vendor patch reference has been recorded for CVE-2026-49413 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-2026-49413

No threat campaign in the Threadlinqs corpus currently references CVE-2026-49413, 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, public proof-of-concept repositories. 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-26:30.linux.asc)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-49413
Full detection coverage and IOCs for threats exploiting CVE-2026-49413 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp