# CVE-2019-18282: Information disclosure in n/a

> An attacker can infer the boot-time hash secret used for UDP IPv6 flow labels, potentially enabling device tracking or traffic analysis.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 16 Jan 2020
- **Updated:** 5 Aug 2024
- **Also known as:** A-148588557, ASB-A-148588557, DEBIAN-CVE-2019-18282, GHSA-gc9j-xjc6-h7v6, UBUNTU-CVE-2019-18282

## What is CVE-2019-18282?

CVE-2019-18282 is a medium-severity vulnerability in Debian Debian Linux, published on 16 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The flow_dissector feature in the Linux kernel 4.3 through 5.x before 5.3.10 has a device tracking vulnerability, aka CID-55667441c84f. This occurs because the auto flowlabel of a UDP IPv6 packet relies on a 32-bit hashrnd value as a secret, and because jhash (instead of siphash) is used. The hashrnd value remains the same starting from boot time, and can be inferred by an attacker. This affects net/core/flow_dissector.c and related code.

Weakness: CWE-330 (Use of Insufficiently Random Values)

## Which versions are affected by CVE-2019-18282?

It affects 14 products.


Products: Debian Debian Linux, Linux kernel, Netapp 8300 Firmware, Netapp 8700 Firmware, Netapp A400 Firmware, Netapp A700s Firmware, Netapp Active Iq Unified Manager, Netapp Cloud Backup, Netapp Data Availability Services, Netapp E-Series Santricity Os Controller, Netapp H610s Firmware, Netapp Hci Management Node, Netapp Solidfire, Netapp Steelstore Cloud Integrated Storage.

## How do I fix CVE-2019-18282?

Apply the vendor's patch.

## Is CVE-2019-18282 being exploited?

There is no known exploitation of CVE-2019-18282 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-18282 and fix it if it is affected.

What it is: CVE-2019-18282 is a medium-severity vulnerability in Debian Debian Linux, published on 16 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-18282 in the wild and no public exploit code.

Affected product: Debian Debian 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-2019-18282/ (Markdown: https://insights.sbomify.com/CVE-2019-18282/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-18282
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-18282
- OSV: https://osv.dev/vulnerability/CVE-2019-18282

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-18282/
Summaries are generated and may contain mistakes; the official description above is the record.