# CVE-2019-19065: Denial of service in n/a

> A disputed memory leak in the Linux kernel InfiniBand driver could theoretically allow denial of service via memory consumption, though exploitation is considered impractical.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 18 Nov 2019
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-19065, GHSA-hxgv-f94v-h963, UBUNTU-CVE-2019-19065

## What is CVE-2019-19065?

CVE-2019-19065 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 18 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A memory leak in the sdma_init() function in drivers/infiniband/hw/hfi1/sdma.c in the Linux kernel before 5.3.9 allows attackers to cause a denial of service (memory consumption) by triggering rhashtable_init() failures, aka CID-34b3be18a04e. NOTE: This has been disputed as not a vulnerability because "rhashtable_init() can only fail if it is passed invalid values in the second parameter's struct, but when invoked from sdma_init() that is a pointer to a static const struct, so an attacker could only trigger failure if they could corrupt kernel memory (in which case a small memory leak is not a significant problem).

Weakness: CWE-401 (Missing Release of Memory after Effective Lifetime)

## Which versions are affected by CVE-2019-19065?

It affects 3 products.


Products: Canonical Ubuntu Linux, Linux kernel, Opensuse Leap.

## How do I fix CVE-2019-19065?

Apply the vendor's patch.

## Is CVE-2019-19065 being exploited?

There is no known exploitation of CVE-2019-19065 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-2019-19065 and fix it if it is affected.

What it is: CVE-2019-19065 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 18 Nov 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-2019-19065 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-2019-19065/ (Markdown: https://insights.sbomify.com/CVE-2019-19065/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-19065
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-19065
- OSV: https://osv.dev/vulnerability/CVE-2019-19065

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-19065/
Summaries are generated and may contain mistakes; the official description above is the record.