---
title: "CVE-2018-16948\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-2018-16948?format=md
keywords: index, follow
---

# CVE-2018-16948

Publication date 12 September 2018

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2018-16948?format=md#impact-score)

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## Description

An issue was discovered in OpenAFS before 1.6.23 and 1.8.x before 1.8.2.
Several RPC server routines did not fully initialize their output variables
before returning, leaking memory contents from both the stack and the heap.
Because the OpenAFS cache manager functions as an Rx server for the AFSCB
service, clients are also susceptible to information leakage. For example,
RXAFSCB\_TellMeAboutYourself leaks kernel memory and KAM\_ListEntry leaks
kaserver memory.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| openafs | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Not affected |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Not affected |
| 21.04 hirsute | Not affected |
| 20.10 groovy | Not affected |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Not affected |
| 19.04 disco | Not affected |
| 18.10 cosmic | Ignored end of life |
| 18.04 LTS bionic | Vulnerable |
| 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**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16948)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-16948)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-16948)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-16948)

### Other references

* <http://openafs.org/pages/security/OPENAFS-SA-2018-002.txt>
* <https://www.cve.org/CVERecord?id=CVE-2018-16948>