---
title: "CVE-2017-16837\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-2017-16837?format=md
keywords: index, follow
---

# CVE-2017-16837

Publication date 16 November 2017

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2017-16837?format=md#impact-score)

Toggle side navigation

## Description

Certain function pointers in Trusted Boot (tboot) through 1.9.6 are not
validated and can cause arbitrary code execution, which allows local users
to overwrite dynamic PCRs of Trusted Platform Module (TPM) by hooking these
function pointers.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| tboot | 26.04 LTS resolute | Not in release |
| 25.10 questing | Fixed 1.9.7-0ubuntu1 |
| 25.04 plucky | Fixed 1.9.7-0ubuntu1 |
| 24.10 oracular | Fixed 1.9.7-0ubuntu1 |
| 24.04 LTS noble | Fixed 1.9.7-0ubuntu1 |
| 23.10 mantic | Fixed 1.9.7-0ubuntu1 |
| 23.04 lunar | Fixed 1.9.7-0ubuntu1 |
| 22.10 kinetic | Fixed 1.9.7-0ubuntu1 |
| 22.04 LTS jammy | Fixed 1.9.7-0ubuntu1 |
| 21.10 impish | Fixed 1.9.7-0ubuntu1 |
| 21.04 hirsute | Fixed 1.9.7-0ubuntu1 |
| 20.10 groovy | Fixed 1.9.7-0ubuntu1 |
| 20.04 LTS focal | Fixed 1.9.7-0ubuntu1 |
| 19.10 eoan | Fixed 1.9.7-0ubuntu1 |
| 19.04 disco | Fixed 1.9.7-0ubuntu1 |
| 18.10 cosmic | Fixed 1.9.7-0ubuntu1 |
| 18.04 LTS bionic | Vulnerable |
| 17.10 artful | Ignored end of life |
| 17.04 zesty | Ignored end of life |
| 16.04 LTS xenial | Vulnerable |
| 14.04 LTS trusty | 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**

7.8 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.8 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16837)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-16837)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-16837)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-16837)

### Other references

* <https://sourceforge.net/p/tboot/code/ci/521c58e51eb5be105a29983742850e72c44ed80e/>
* <https://www.cve.org/CVERecord?id=CVE-2017-16837>