# CVE-2019-19947: Information disclosure in n/a

> An attacker with physical access can leak uninitialized kernel memory to a connected USB device via the Kvaser USB CAN driver.

- **Severity:** Medium 4.6 (`CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 23 Dec 2019
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-19947, GHSA-hvvf-8784-846m, UBUNTU-CVE-2019-19947

## What is CVE-2019-19947?

CVE-2019-19947 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 23 Dec 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In the Linux kernel through 5.4.6, there are information leaks of uninitialized memory to a USB device in the drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c driver, aka CID-da2311a6385c.

Weakness: CWE-908 (Use of Uninitialized Resource)

## Which versions are affected by CVE-2019-19947?

It affects 13 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Netapp Active Iq Unified Manager, Netapp Aff Baseboard Management Controller, Netapp Cloud Backup, Netapp Data Availability Services, Netapp E-Series Santricity Os Controller, Netapp Fas\/Aff Baseboard Management Controller, Netapp Hci Baseboard Management Controller, Netapp Solidfire \& Hci Management Node, Netapp Solidfire Baseboard Management Controller, Netapp Steelstore Cloud Integrated Storage.

## How do I fix CVE-2019-19947?

Apply the vendor's patch.

## Is CVE-2019-19947 being exploited?

There is no known exploitation of CVE-2019-19947 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-19947 and fix it if it is affected.

What it is: CVE-2019-19947 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 23 Dec 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-19947 in the wild and no public exploit code.

Affected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2019-19947/ (Markdown: https://insights.sbomify.com/CVE-2019-19947/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-19947
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-19947
- OSV: https://osv.dev/vulnerability/CVE-2019-19947

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-19947/
Summaries are generated and may contain mistakes; the official description above is the record.