---
title: "CVE-2014-4860\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2014-4860?format=md
keywords: index, follow
---

# CVE-2014-4860

Publication date 31 January 2020

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**6.8 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2014-4860?format=md#impact-score)

Toggle side navigation

## Description

Multiple integer overflows in the Pre-EFI Initialization (PEI) boot phase
in the Capsule Update feature in the UEFI implementation in EDK2 allow
physically proximate attackers to bypass intended access restrictions by
providing crafted data that is not properly handled during the coalescing
phase.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| edk2 | 15.04 vivid | Not affected |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.8 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Physical |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.8 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4860)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2014-4860)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2014-4860)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2014-4860)

### Other references

* <https://www.mitre.org/sites/default/files/publications/14-2221-extreme-escalation-presentation.pdf>
* <https://www.cve.org/CVERecord?id=CVE-2014-4860>